do these fit standard american 1/4 inch tube?

I had to use a heat gun to get the 1/4" tube over the connector. Someone else suggested hot water which I'm sure works but is a little impractical for field use. I happen to have a cordless heat gun so that's perfect.

About how many can be connected to a 1/2" drip line with about 30 psi?

These are 1/4 in not 1/2 in but I suppose you could use adapters to get to 1/2 in tubing. I would think it depends on your pressures, mine here are high so it would prob work. All mine are 1/4 in.

At 25 psi, what is the minimum/maximum water flow/volume per hour for this product?

Hi, this drip irrigation emitter has a flow rate of 0-120L/H; the drip emitters discharge is also adjustable, you can adjust the drip head to get the water flow you want

What is the differnce between this one & other model that does not have extra barb? Is extrabard the only difference?

Not sure about the extra barb, but these trip emitters work well, the adjustable head functions as described. Fits tight inside 1/4 tubing, does not separate or split.

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50pcs Drip Emitters for 1/4" Drip Irrigation Tubing, Adjustable 360 Degree Water Flow Drippers on 5" Arrow Stake, Garden Irrigation Drippers for (4-7mm) Watering System

Product ID: 321647056

Details

Brand
La Farah
Material
Plastic
Model name
La Farah 50pcs
Size
50pcs 1/4"
Style
Adjustable

💧18 GPH max flow rate

📏5-inch stake for precise placement

🔄360° adjustable water flow

฿1566

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Description

🌿 Water Smarter, Grow Stronger — Your Garden’s VIP Hydration Hack!

CLOG RESISTANT DESIGN - Wide, deep water passages minimize blockages, ensuring consistent irrigation without interruption—because your plants deserve reliability.
EFFORTLESS MAINTENANCE - Removable dripper caps allow quick cleaning and inspection, keeping your irrigation system running flawlessly with minimal hassle.
DURABLE WEATHER RESISTANT - Crafted from premium anti-UV, anti-corrosion plastic to withstand sun, rain, and time—garden tech that lasts season after season.
PRECISION HYDRATION CONTROL - Adjust water flow from a gentle drip to full shut-off with a simple twist, optimizing every drop for your garden’s unique needs.
UNIVERSAL TUBING COMPATIBILITY - Fits 4-7mm micro-tubing effortlessly, giving you flexible setup options across pots, shrubs, and trees.

The La Farah 50pcs Drip Emitters set offers adjustable 360-degree water flow emitters with a 5-inch stake, designed for 1/4" drip irrigation tubing (4-7mm). Featuring clog-resistant wide passages and durable anti-UV plastic, these emitters deliver up to 18 gallons per hour at 40 PSI, perfect for precise, efficient watering of pots, shrubs, and trees. Easy to install, clean, and customize, they bring professional-grade irrigation control to your garden.

Specifications

ASIN	B0914T1LHN
Best Sellers Rank	#122,487 in Health ( See Top 100 in Health ) #52 in Irrigation Systems
Brand Name	La Farah
Control Type	Adjustable Emitters
Customer Reviews	4.3 4.3 out of 5 stars (2,506)
Fit Type	Barbed Tubing Connection
Included Components	50pcs drip irrigation emitters with stake
Item Dimensions	13.4 x 2.4 x 1.4 centimeters
Item Shape	Red Irrigation Dripper
Item Weight	231 Grams
Manufacturer	La Farah
Material	Plastic
Maximum Pressure	40 Pound per Square Inch
Model Name	La Farah 50pcs Drip Emitters
Model Number	50pcs Drip Irrigation Emitters
Number of Pieces	50
Number of Sets	1
Part Number	Lafarah01
Pattern	multi-point
Plant or Animal Product Type	Flower
Power Source	Water Pressure-Driven
Set Name	50pcs
Size	50pcs 1/4" Drip Emitters
Special Features	Adjustable
Style	Adjustable Drip Irrigation Emitters
Unit Count	50.0 Count
Volume Capacity	50pcs Drip Emitters

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