We're really keen on these anodized tubeless valves from Muc-Off. Not only do they work as they should, problem free, they also come with a variety of inserts to make sure you can create a really good seal in various rims. Not all rims come with the same rim bed shape and it can be a bit of a problem but not with these! We stock a wide variety of colours in the 44mm length. If you need another length, drop us an email and we'll get you up n' running!