---
product_id: 91369071
title: "Ultra Super Flex Replacement Bowsight Fiber 40\""
brand: "nanoptics"
price: "฿1363"
currency: THB
in_stock: true
reviews_count: 8
category: "Nanoptics"
url: https://www.desertcart.co.th/products/91369071-ultra-super-flex-replacement-bowsight-fiber-40
store_origin: TH
region: Thailand
---

# Brightest fluorescent fiber Durable, fade & crack resistant Flexible, easy to flare & bend Ultra Super Flex Replacement Bowsight Fiber 40"

**Brand:** nanoptics
**Price:** ฿1363
**Availability:** ✅ In Stock

## Summary

> 🎯 Light up your aim with the brightest, toughest fiber optic upgrade!

## Quick Answers

- **What is this?** Ultra Super Flex Replacement Bowsight Fiber 40" by nanoptics
- **How much does it cost?** ฿1363 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/91369071-ultra-super-flex-replacement-bowsight-fiber-40)

## Best For

- nanoptics enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Crafted to resist fading and cracking, this fiber keeps your bow sight sharp season after season.
- • **Ultimate Flexibility:** Easily bends and flares to fit any sight pin perfectly, giving you a custom fit every time.
- • **Unmatched Brightness:** Stand out with the brightest fiber optic on the market, ensuring your sight is always visible.
- • **Vibrant Customization:** Choose your favorite fluorescent color to personalize your gear and elevate your style.
- • **Universal Compatibility:** Fits all bowsights and sight pins, making upgrades effortless across brands.

## Overview

Nanoptics Ultra Super Flex Replacement Bowsight Fiber is a 40-inch, high-visibility fluorescent optical fiber designed for archery sights. Renowned for its superior brightness, durability, and flexibility, it fits all bowsight brands and allows easy customization. Made in the USA, it’s the top choice for pros and enthusiasts seeking reliable, vibrant sight enhancements.

## Description

Nanoptics Ultra Super Flex (USF) fiber is the perfect fiber for everyday use by competition pros and enthusiasts alike. As our general use fiber, it is the brightest fiber available on the market. USF fibers easily flare with heat to stay secure in your sight pin. Each replacement pack contains one 40” fiber in your choice of size and vivid color. Our fibers fit all brands of archery sights and sight pins. Check with your sight manufacturer for proper size. Nanoptics is the worldwide leader of fluorescent optical fiber. As the leading supplier, we manufacture the brightest and toughest fiber in the industry. All of our products are proudly made in the USA.

Review: Excellent light transmission and flexible - Fantastic quality product. Very flexible, and seems pretty kink-resistant. Size is spot-on. Very bright transmission of light with the green color, and I was able to easily and carefully flare the tip to get a slightly bigger dot for visibillty as well as retention in the pin. Great value, and improved the quality of my sight with a better dot.
Review: It's BRIGHT - This stuff works!!! Bow sight company's should use this fiber optic on there sights ! It's alot tougher than I expected it to be a bright! JUST BUY IT!! YOU WILL NOT BE DISAPPOINTED!! I have a old axcel 5 pin bow sight that I love and the fiber optic was dry rotted and falling apart I replaced it with this and I'm extremely happy with ot!

## Features

- Bright - Fluorescent colors stand out against your target
- Durable - Won't fade or crack over time
- Flexible - Easily bends around sights and pins
- Customize - Use colors you prefer on your sight
- Standard sizes - Fits all bowsights and sight pins

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B009IUWBC8 |
| Best Sellers Rank | #129,229 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #196 in Archery Bow Maintenance Accessories |
| Brand Name | Nanoptics |
| Color | Blue |
| Compatible Devices | Compatible with all devices |
| Customer Reviews | 4.4 4.4 out of 5 stars (151) |
| Manufacturer | Nanoptics, Inc. |
| Material Type | optical fiber |
| Mounting Type | Bow Sight Mount |
| Night vision | No |
| Sport Type | Archery |
| UPC | 608729736875 |

## Product Details

- **Brand:** Nanoptics
- **Color:** Blue
- **Compatible Devices:** Compatible with all devices
- **Item Display Dimensions:** 40 inches
- **Manufacturer:** Nanoptics, Inc.
- **Material:** optical fiber
- **Mounting Type:** Bow Sight Mount
- **Night vision:** No
- **Sport:** Archery
- **UPC:** 608729736875

## Images

![Ultra Super Flex Replacement Bowsight Fiber 40" - Image 1](https://m.media-amazon.com/images/I/51jbF5gMqCL.jpg)
![Ultra Super Flex Replacement Bowsight Fiber 40" - Image 2](https://m.media-amazon.com/images/I/61HyLfipdfL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent light transmission and flexible
*by M***S on October 28, 2025*

Fantastic quality product. Very flexible, and seems pretty kink-resistant. Size is spot-on. Very bright transmission of light with the green color, and I was able to easily and carefully flare the tip to get a slightly bigger dot for visibillty as well as retention in the pin. Great value, and improved the quality of my sight with a better dot.

### ⭐⭐⭐⭐⭐ It's BRIGHT
*by J***. on July 20, 2025*

This stuff works!!! Bow sight company's should use this fiber optic on there sights ! It's alot tougher than I expected it to be a bright! JUST BUY IT!! YOU WILL NOT BE DISAPPOINTED!! I have a old axcel 5 pin bow sight that I love and the fiber optic was dry rotted and falling apart I replaced it with this and I'm extremely happy with ot!

### ⭐⭐⭐⭐ Fluorescent orange fiber
*by J***S on October 29, 2021*

Very bright and high quality but definitely not orange. It is identical to the red fiber I have on my sight already.

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**Shop now:** [https://www.desertcart.co.th/products/91369071-ultra-super-flex-replacement-bowsight-fiber-40](https://www.desertcart.co.th/products/91369071-ultra-super-flex-replacement-bowsight-fiber-40)

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-04-23*