44mm valve stem with removable valve core for easier inflation fits most tubeless road rimsfits most tubeless rimsstans notubes ztr rims and wheelscampagnolo 2 way fit wheelscorima tubeless wheelsdt swiss tricon tubeless wheelsfulcrum 2 ways fit wheelsshimano tubeless wheelssold in pairs 2 in a packfor non tubeless rims please consult wwwnotubescom for the proper tubeless conversion kitincludingamerican classic wheelsbontrager wheels and rimsdt swiss wheels and rimseaston wheels and rim