This pair of black anodized aluminum tire valve stems is a low profile of only 1 3/16" in length, making them fit any tight space needing a compact stance. Designed with a metal base so they will not pull thru the wheel rim and needs a minimum of 8mm hole for clearance. An inner and outer rubber grommet washer provides a leak proof seal along with an external nut that allows for easy tightening of the valve stem for any needed maintenance. Sold as a pair. Stems need a minimum 8mm hole for clearance.