do these fit the JB weld 25ml epoxy tubes?

I don't know about JB Weld. I bought this for 3M Scotch-Weld 08966 Epoxy Adhesive DP420 50mL, DP420, Black

Will they fit adhesive technology JF-311 cartridges?

Tried to look on the site only cartridges I saw were larger than the 25/50ml cartridge these are used for. I would doupt it.

Does this fit 2:1 ratio?

Yes! Good For 1:1 and 2:1 ratio formulas

Where does one purchase the 'needle' tip shown in the sales photo?

Those nozzles with the large round base are available on Amazon ... but they do NOT fit the dual tube Hysol adhesive cartridge. That cartridge requires the end with the flat sides so it will fit onto the outlet and twist-lock into place.

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Mixing Nozzles Adhesive Cartridges Tip for 50ml Resin Mixer Adhesive Applicatior 16-Element, 3.6in, 1:1 & 2:1 ratios(20 Pieces)

Mixing Nozzles Adhesive Cartridges Tip for 50ml Resin Mixer Adhesive Applicatior 16-Element, 3.6in, 1:1 & 2:1 ratios(20 Pieces)

Product ID: 166136556

Details

Brand
FRIGIIRE
Item Form
Paste
Material
Plastic
Special Feature
High Nozzles
Specific Uses For Product
Repair

📏3.6-inch precision length

🔄16-element high-efficiency mixing

⚖️Compatible with 1:1 & 2:1 ratios

$23.09

Duties & taxes included

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Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Mix it right, every time — because precision is power.

BULK PACK ADVANTAGE - 20-piece set keeps your projects flowing without interruption—never run out mid-job.
MATERIAL MATCHMAKER - Perfect for bonding metals, wood, plastics, rubber, masonry, and PCB mounting—your all-in-one solution.
UNIVERSAL COMPATIBILITY - Seamlessly fits all standard B-System 50ml dual-barrel cartridges for versatile use.
PRECISION MIXING MASTERY - 16 internal elements ensure flawless adhesive blending every time, cutting waste by 50%.
COMPACT EFFICIENT DESIGN - 3.6-inch nozzle length optimizes reach and control for professional-grade application.

This 20-piece set of 3.6-inch mixing nozzles features 16 internal elements designed for high-efficiency adhesive blending, compatible with 1:1 and 2:1 epoxy ratios. Engineered to reduce adhesive waste by 50%, these nozzles fit all standard B-System 50ml dual-barrel cartridges and excel in bonding a wide range of materials including metals, wood, plastics, rubber, and masonry. Ideal for professionals seeking precision and reliability in every application.

Specifications

ASIN	B07Y1DGHZB
Best Sellers Rank	#30,884 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #14 in Adhesive Dispenser Accessories
Brand Name	FRIGIIRE
Color	green
Compatible Material	Plastic, Rubber, Wood
Container Type	Cartridge
Customer Reviews	4.7 4.7 out of 5 stars (295)
Item Form	Paste
Item Package Quantity	1
Item Weight	0.01 Ounces
Manufacturer	What's news
Material Type	Plastic
Number of Pieces	20
Other Special Features of the Product	High Efficiency Nozzles Reducing Adhesive Waste by 50%
Part Number	PEG_USK-03JUNE23-B083JKDNRJ
Specific Uses For Product	Repair, Woodworking
UPC	745103917670
Unit Count	20.0 Count
Viscosity Level	High
Volume	50 Milliliters
Water Resistance Level	Not Water Resistant

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