DESIGN :Multicolor car air valve caps and High grade & Light-Weight aluminum alloy . The car wheel tire air valve stem caps are durable, anti-rust, antioxidant even in extreme weather. Make your car looks more beautiful and luxury. Best gift for friends, family menbers and etc. Size:Height=17 mm/ 0.67 inches, inner Diameter=8 mm/0.3 inches Number: 4 valve stem caps, 1 keychain. Material: aluminium ?Note: It is normal phenomenon that this wheel air valve cover may fade when exposed to the sun for a long time, please replace or change these wheel air valve covers regularly for better use.