---
product_id: 437124365
title: "MASTERY MART 28 Inch Office Chair Base, Heavy Duty 2400 Lbs, Reinforced Metal Desk Chair Replacement, Universal Gas Cylinder Hole Caster Socket, Matte Black"
brand: "mastery mart"
price: "฿7057"
currency: THB
in_stock: true
reviews_count: 13
category: "Mastery Mart"
url: https://www.desertcart.co.th/products/437124365-mastery-mart-28-inch-office-chair-base-heavy-duty-2400
store_origin: TH
region: Thailand
---

# Matte black reinforced metal with chrome finish 2400 lbs heavy-duty load capacity Universal fit for 7/16" x 7/8" casters & 2" gas cylinders MASTERY MART 28 Inch Office Chair Base, Heavy Duty 2400 Lbs, Reinforced Metal Desk Chair Replacement, Universal Gas Cylinder Hole Caster Socket, Matte Black

**Brand:** mastery mart
**Price:** ฿7057
**Availability:** ✅ In Stock

## Summary

> 🪑 Upgrade your throne with rock-solid support and sleek style!

## Quick Answers

- **What is this?** MASTERY MART 28 Inch Office Chair Base, Heavy Duty 2400 Lbs, Reinforced Metal Desk Chair Replacement, Universal Gas Cylinder Hole Caster Socket, Matte Black by mastery mart
- **How much does it cost?** ฿7057 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/437124365-mastery-mart-28-inch-office-chair-base-heavy-duty-2400)

## Best For

- mastery mart enthusiasts

## Why This Product

- Trusted mastery mart brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Floor-Friendly & Safe:** Low center of gravity design prevents tipping and protects your floors from scratches.
- • **Sleek Matte Black Finish:** Premium chrome-plated metal base adds a modern, executive look to your workspace.
- • **Cost-Effective Chair Revival:** Replace just the base to save hundreds and extend the life of your favorite chair effortlessly.
- • **Unmatched Strength & Stability:** Supports up to 2400 lbs with reinforced tubular iron construction for ultimate durability.
- • **Seamless Universal Compatibility:** Fits most office and gaming chairs including Herman Miller with standard caster & gas cylinder sizes.

## Overview

The MASTERY MART 28 Inch Office Chair Base is a heavy-duty, matte black metal replacement base designed to support up to 2400 lbs. Engineered for universal compatibility with standard casters and gas cylinders, it offers superior stability and floor protection. Easy to install and crafted with premium materials, it’s the smart, budget-friendly upgrade to revive your office or gaming chair with professional-grade durability and style.

## Description

Buy MASTERY MART 28 Inch Office Chair Base, Heavy Duty 2400 Lbs, Reinforced Metal Desk Chair Replacement, Universal Gas Cylinder Hole Caster Socket, Matte Black: Managerial & Executive Chairs - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Fits Stapes Dexley Chair, brought old chair back to life! - A crack formed in the plastic base of my "Union & Scale Dexley" chair from Staples, as seen in the "BEFORE" pictures. This caused a tilt that made the chair almost unusable, though the rest of the chair was in excellent condition. I was able to remove the old base using a hacksaw, several hours, several bandaids, and lots of sweat. Installing the new base was simple - it only took a few minutes, 5 screws, and installing the old wheels (which fit perfectly). Now instead of spending $180-$400 on a new chair, my old chair is working good as new ("AFTER" picture). I weigh about 330 pounds, I will update this review if the base fails in the future, but it seems pretty sturdy. I want to reiterate how difficult it was to remove the old base. If you have a crack like mine, know that there is a metal ring on the piston that digs into the plastic, basically fusing with the base. No amount of hammering will get it off. You will need to cut it off like I did, though interestingly the base was pushed so far up that I could have just put the new base on the bottom and it would have worked fine (2 bases!). I think if I get a new chair with a plastic base in the future, I will hammer off this one and use it again instead. Plastic bases are trash.
Review: Perfect Replacement or Upgrade so far! - I had replaced the gas cylinder in my older office chair first, it ended up sinking through the base and hitting the floor, making the chair unstable and uncomfortable. So I decided to try replacing the base with a metal one instead of plastic, and this works great so far. Feels much sturdier, and the angle and material gives you a slight height boost as well. Works with standard size gas cylinders as well, and assembly of the base is super easy and quick. Honestly the hardest/longest part for you is going to be getting your OLD base/cylinder OUT of the old chair, that was extremely difficult for me, you should be prepared with a Rubber Mallet, some WD40, and possibly a Pipe Wrench, and bring some muscle cause all that stuff is set by weight and if you have an older chair like me, it was ROUGH to come off, even after doing it recently to replace the gas cylinder. Good luck! No issues so far, will update if necessary.

## Features

- 🥇【Universal Size】Mastery Mart gaming chair base replacement is suitable for most chairs on the market including Herman miller (office chair, game chair, office chair, executive chair). It supports casters measuring 7/16" x 7/8" (11 mm x 22 mm) and gas cylinders with a 2" (5 cm) diameter.
- 🥇【Premium Craftsmanship】Crafted from premium chrome-plated metal, this heavy-duty base features a sleek matte finish. Its robust tubular iron construction, reinforced with heavy-duty screws, provides superior load-bearing capacity and stability, supporting weights of up to 2400 lbs.
- 🥇【Safety & Floor Protection】Our office chair base replacement prioritizes stability by maintaining a low center of gravity, helping prevent tipping and floor scratches. It not only protects your flooring but also saves you from the cost of buying a new chair.
- 🥇【Budget-Friendly Solution】Replacing just the chair base is a smart and cost-effective solution if your seat is still in good condition. Save money while keeping your favorite chair in use.
- 🥇【100% Satisfaction Guaranteed】Very easy to install and replacement with our simple and clear instruction sheet. If this doesn't fit your chair, you can simply return it.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09X4MHQP4 |
| Age Range (Description) | Adult |
| Arm Style | Armless |
| Assembly Instructions Description | Includes an instruction sheet for easy assembly. |
| Back Style | Solid Back |
| Best Sellers Rank | #38,790 in Office Products ( See Top 100 in Office Products ) #77 in Managerial Chairs & Executive Chairs |
| Brand | MASTERY MART |
| Color | Matte Black |
| Customer Reviews | 4.4 4.4 out of 5 stars (828) |
| Date First Available | April 3, 2022 |
| Fill Material | Foam |
| Finish Type | Polished |
| Form Factor | Metal |
| Furniture Finish | Chrome |
| Included Components | Base Only |
| Indoor/Outdoor Usage | Indoor |
| Is Foldable | No |
| Item Weight | 6.6 pounds |
| Item model number | MM-BASE-REP-C-BLACK |
| Leg Style | wheels |
| Manufacturer | Mastery Mart Inc. |
| Maximum Weight Recommendation | 2400 Pounds |
| Pattern | Solid |
| Product Care Instructions | Wipe Clean |
| Product Dimensions | 28"D x 28"W x 4"H |
| Reclining Position Count | 1 |
| Recommended Uses For Product | Office |
| Room Type | Office |
| Seat Depth | 28 inches |
| Seat Height | 28 Inches |
| Shape | Round |
| Size | 28D x 28W x 4H in |
| Special Feature | Ergonomic |
| Style | Matte Black |
| Surface Recommendation | Hard Floor |
| Tilting | No |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** MASTERY MART
- **Color:** Matte Black
- **Material:** Metal
- **Product Dimensions:** 28"D x 28"W x 4"H
- **Size:** 28D x 28W x 4H in

## Images

![MASTERY MART 28 Inch Office Chair Base, Heavy Duty 2400 Lbs, Reinforced Metal Desk Chair Replacement, Universal Gas Cylinder Hole Caster Socket, Matte Black - Image 1](https://m.media-amazon.com/images/I/51HZozdXLlL.jpg)

## Questions & Answers

**Q: Does the bear in the first image come with the purchase, or do i need to buy one separately?**
A: Gotta buy it separately, but still a great product

**Q: Will this fit a serta executive high back office chair with lumbar support ergonomic upholstered swivel gaming friendly design?**
A: Can’t really say as I don’t know the chair. If it has a standard base it should fit without any issues. I used the one we bought for a gaming chair and it worked great.

**Q: Are the wheel inserts metal as well? My chair came with a metal base, but the inserts where the wheels fit into it were plastic and broke.**
A: I believe it's all metal..

**Q: Is the base one piece?**
A: No the base is not one piece.  The base must be assembled.  However, the way it constructed makes it very strong.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fits Stapes Dexley Chair, brought old chair back to life!
*by T***L on July 24, 2023*

A crack formed in the plastic base of my "Union & Scale Dexley" chair from Staples, as seen in the "BEFORE" pictures. This caused a tilt that made the chair almost unusable, though the rest of the chair was in excellent condition. I was able to remove the old base using a hacksaw, several hours, several bandaids, and lots of sweat. Installing the new base was simple - it only took a few minutes, 5 screws, and installing the old wheels (which fit perfectly). Now instead of spending $180-$400 on a new chair, my old chair is working good as new ("AFTER" picture). I weigh about 330 pounds, I will update this review if the base fails in the future, but it seems pretty sturdy. I want to reiterate how difficult it was to remove the old base. If you have a crack like mine, know that there is a metal ring on the piston that digs into the plastic, basically fusing with the base. No amount of hammering will get it off. You will need to cut it off like I did, though interestingly the base was pushed so far up that I could have just put the new base on the bottom and it would have worked fine (2 bases!). I think if I get a new chair with a plastic base in the future, I will hammer off this one and use it again instead. Plastic bases are trash.

### ⭐⭐⭐⭐⭐ Perfect Replacement or Upgrade so far!
*by J***E on August 31, 2024*

I had replaced the gas cylinder in my older office chair first, it ended up sinking through the base and hitting the floor, making the chair unstable and uncomfortable. So I decided to try replacing the base with a metal one instead of plastic, and this works great so far. Feels much sturdier, and the angle and material gives you a slight height boost as well. Works with standard size gas cylinders as well, and assembly of the base is super easy and quick. Honestly the hardest/longest part for you is going to be getting your OLD base/cylinder OUT of the old chair, that was extremely difficult for me, you should be prepared with a Rubber Mallet, some WD40, and possibly a Pipe Wrench, and bring some muscle cause all that stuff is set by weight and if you have an older chair like me, it was ROUGH to come off, even after doing it recently to replace the gas cylinder. Good luck! No issues so far, will update if necessary.

### ⭐⭐⭐⭐⭐ Great chair base so far on Day 1
*by S***A on July 17, 2023*

I like many others, had the plastic base and wheel catching in carpet and ripped out the bottom of the stand. Loved this chair after decade or more of chair, it was very attached to it is base. We ended up taking a reciprocating saw to remove the base from from the chair. This metal base is awesome and sturdy. I have the skate rollers and took a light tapping with mallet to get wheels on base. Hoping the chair now lasts until I retire in a few years as this base is very well made if tapping it out to put on a new chair (if needed) doesn't work it would just have to be tossed if chair fails. This base is solid and I highly recommend it if you need a new base for your office chair that only has a base issue. I would also suggest to purchase if you are buying a new chair with a plastic base. You will be saving yourself trouble in the long run. The wheels are on this chair base for life!

## Frequently Bought Together

- MASTERY MART 28" Heavy Duty Office Chair Base Replacement Parts, 2500 Lbs, Desk Chair Reinforced Metal Leg with Universal Gas Cylinder Hole and Casters Sockets, Matte Black
- Mastery Mart Office Chair Caster Wheels for Hardwood Floors, Heavy Duty and Quiet Smooth Rollerblade Wheels for Office Chair, Universal Size (11x22mm), Suitable for Most Chairs
- MASTERY MART Office Chair Gas Lift Cylinder Replacement, 4" Travel Length, Heavy Duty 450 lbs, Hydraulic Pneumatic Shock Piston, Universal Size Fits Most Office Chairs, Class 4, Matte Black

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-01-26*