These Presta valve stems are compatible with tubeless rims and tires for road, gravel, mountain, and fat bike wheels. The kit includes two Presta valve stems, two machined aluminum caps, two nuts, two extra valve cores, a unique machined aluminum valve core remover, and three rubber base options for compatibility with more rim internal shapes.Slotted stem base for compatibility with tire insertsOversized stem nut for better sealing and easier removalStem threaded below rubber seal for better performance on single wall rimsThree rubber bases included: two types of cones (one installed), one channelAvailable in 44mm or 60mm stem length optionsReplacement parts available via Wolf Tooth Right To Repair, including cap kit with two caps, nut kit with two nuts, and valve cores Wolf Tooth Tubeless Valve Stem Kit Tubeless Valves UPC: 812719028714