Protect TPMS equipped valve cores and give tires an additional layer of defense against leaking stem valves at the same time with these black plastic valve stem caps. These replacement caps are constructed of ridged black plastic for easy installation and removal and unlike standard valve caps, each comes with an internal seal. These seals block out moisture that can corrode brass valves and other TPMS components to help extend their life while also creating an air-tight seal on the end of the valve stem to further prevent air loss. Perfect for use on all kinds of vehicles including cars, trucks, ATVs, motorcycles, dirt bikes, bicycles, wheelbarrows and handcarts, as well as pneumatic tire equipped hand trucks. Sold in a bulk pack of 100 caps.