Wolf Tooth's Presta Valve Stem is a high quality valve stem for road, gravel, mountain and fat bikes tubeless trim and tires. This kit includes options to accommodate a variety of interior shapes of rims. Features: Tire Insert Compatible: Slotted Stem Base IMPROVED SEALING: Large stem nut for better seal and easy removal Single wall rim compatible: threaded stem under rubber seal for improved performance Rubber Base Options: 2 types of conical rubber base (one installed) 1 Channel Type Stem Length: 44mm Replacement Parts: Wolf Tooth Right To Repair allows cap kit (2 caps), nut kit (2 nuts) and valve core