Tire Valve Caps (12 Pcs) Heavy-Duty Stem Covers | Dust Proof, with O Rubber Seal | Hexagon Design//RUBBER SEAL INSIDE - All dust caps for wheels has rubber rings, no air leaking on long, tough drives. Made of Aluminum Alloy - Black Metal, Strong, Dust proof, more durable. ESAY TO INSTALL - Hexagon shape, easier to grab and tighten, more convenient. WIDE APPLICATION - Universal fit for Cars, SUVs, Bike and Bicycle, Trucks, Motorcycles. Warning - Although these premium aluminum tire caps are anodized and durable, they can fuse to the tire valve stem if not cared for properly. Prior to installation and between reapplication, apply grease to help prevent fusion. Aluminum Alloy stem tire valve caps with RUBBER RING : Metal stem tire valve caps can protect your valves from dirt and corrosion, help you to replace original bad valve cap of tyre. Good quality material: The valve cap is made of durable aluminum alloy and rubber which can extend service life of tire. Universal size fits for most cars, bus, trucks, motorcycle, bikes and other vehicles. Easy to hold and install: With hexagon shape design, convenient to install. Conveniently install or remove when you want to check air pressure. Specifications: Quantity: 12 pcs Material: aluminum alloy + O rubber seal Size: 16.8 x 10 mm/ 0.66 x 0.39 inch Package includes: 12Pcs x Tire valve dust caps