Aluminum Wheel Stem Knurling Style Skull Tire Valve Cap. Feature: Sturdy and Durable: These Wheel Air Valve Covers Are Made of Aluminum Alloy, Hard and Durable, the Shape is Not Easy to Change Even if It Gets Pressure. Sealed Shape: the Valve Stems Covers Features with Rubber O-ring Seal Inner, So It Can Not Only Help Prevent Leakage, but Also Can Prevent Water, Snow, and Dust from Coming into the Tire, Thus Prolong the Tires Service Life Wide Application: This Set of Wheel Air Valve Covers Fits for Many Kinds of Vehicles with American Valves Caps, Such As Cars, Trucks, Motorcycles, Bicycles, Electromobility, Etc. Size: Diameter is 1.1 Cm, Height is 1.6 Cm, Can Fit Your Tires Well with Complete O-ring Seal, Dustproof and Waterproof. Knurling Design Can Provide a Good Grip for Screwing Them on and Off. Easy to Install or Remove when You Want to Check Air Pressure. Easy to Install and Remove Simply Screw on the Tire Valve, It Can Be Installed Without Tools. They Are Easy to Remove. This Car Tire Aluminium Alloy Valve Cap is Extremely Durable and Sturdy, Anodized to Prevent Corrosion, Light Weight, Suitable for Most Vehicles. Specifications: Material: copper Size(L*W): 11*16mm Package Includes: 8Pcs X Tire Valve Caps