Valve Stem Caps, Ampper Chrome MMJ Skull Style Tire Valve Stem Caps, Car Rubber Wheel Tyre Valve Stem Stainless Steel Cover Set + Wrench Keychain (Pack of 4) Fits almost all of the valve stems: cars, SUV, truck, motorcycle, bicycle, UTV & ATV. Designed to replace plastic caps. Material: chrome stainless steel alloy, feature a completed O-ring seal. Quantity: 1 sets (4 Valve Stem Caps) + 1 wrench keychain. Caps size: 1/2 in long. Color: chrome silver. Easy install, only screws onto tire valve stem.