Give your wheels a clean, finished look and some extra protection with these Winka valve stem caps. They're made from lightweight aluminum alloy with a sleek gray finish that adds a touch of style. The bolt-in design (not just screw-on) feels more secure. They have a rubber EPDM seal inside to help keep out dust, water, and grime, which can help protect the valve core and extend tire life. Each cap is about 2 inches long. They're universal and should fit most cars, trucks, motorcycles, and bicycles – just check your valve stem size to be sure. Installation is easy: just hand-tighten them (recommended torque 7-10Nm, so don't overdo it!). The pack comes with 5 caps, so you've got one for each tire plus a spare. A simple, affordable upgrade for your ride.