Wolf Tooth Tubeless Presta Valve Stem Kit. Features: Presta valve stems are compatible with tubeless rims and tires for Road, Gravel, mountain, and Fatbike wheels Includes two Presta valve stems, two machines aluminum caps, two extra large nuts, two extra valve cores, a unique machined valve core remover, and three rubber base options Slotted stem base for compatibility with tire inserts Threads extend below the rubber seal for better performance on single wall rims Specs: Model: Tubeless Valve Stem Kit Length: 44mm Color: Black Valve: Presta Insert Compatible: Yes Package: Pair