Corrosion-Resistant Design: Featuring a metal shell and plastic insert, these tire valve stem caps resist corrosion, making them ideal for wet and cold weather conditions. Universal Fit: Compatible with all Schrader valve stems, including cars, SUVs, trucks, RVs, bicycles, and motorcycles. Inner dimensions: 0.31" diameter, 0.54" height. Easy Installation: Designed with horizontal stripes for a secure grip, these valve stem caps are effortless to install or remove by hand. Leak-Proof Protection: A built-in sealing ring inside the plastic liner ensures a tight, leak-proof seal, safeguarding against tire pressure loss. Stylish & Durable: Made from lightweight aluminum alloy with a laser-etched emblem and anodized metallic finish, these tire caps combine style and durability, perfect for gifting. Tire Valve Stem Caps - (4 Pack) Premium Metal Air Caps with Plastic Liner, Durable, Corrosion Resistant and Leak-Proof, Universal Fit for Cars, Trucks, Motorcycles, and Bikes - Blue