i72 Tubeless Valve Stems 40mm Presta Pair - Brass Made with Core Remover Tool, Round Rubber Base with O-Ring for Better Sealing

These mounted easily and had no leak issues at all.

Valve leaks around the base like a few other reviews said. Spent hours trying to figure out the problem, thought leaking at spoke nipples was due to a leak in the tape but came to realize it was the valves. Adjusted multiple times and added sealant but nothing will get these valves to stop leaking. Don’t waste your money or time buying these!

Ive gone through a lot of valve stems in my time using tubeless tires. These are by far the best-built Ive seen - a bit more substantial than other brands Ive used. They also have removable cores, which is huge for those of us adding sealant without wanting to pop the tire bead off. Im going to see if they have a 60mm length version for use with more aero-style rims.

Great worked as expected

Easy to install and, so far at least, properly functioning, these valves were installed on wide rims for 2.8 width tires, using Gorilla Tape to seal the rims for tubeless conversion. No leakage, and no clogging, as yet; but its only been a week, so I cant yet comment on any long term experience with them.