* Synthetic elastomer gasket with 2X the holding power and 5X wear resistance of traditional gasket materials* Two stage seal design, improves sealing and stability on all presta valve stems* Adjustable compression, user can tighten the cap to increase holding power by 4X and compensate for wear* 15 degree stem angle reduces stress on the valve stem from pump hose* SRAM Model ID: WH-SPP-A0
