VersaValve consists of a valve stem with a large, sturdy base plate that can be fitted with different shaped rubber grommets. The large base plate ensures a solid contact with the rim bed and the adaptable grommets provide an airtight fit on all shapes and depths of rim. VersaValve will work on most rims: mountain, road or CX. Grommets are easily replaceable and the various stem lengths mean valve extenders are no longer necessary on deep section wheels. VersaValve kit includes following: a 2 Stems a 2 conical and 2 retangular modular grommets a 4 valve cores a RVC Tool a Instruction diagram