Features: Made of Aluminum Alloy - Gun Gray Metal, Strong, Dust proof, more durable. Easy to Install - Bucktooth Type shape, unique and easier to grab and tighten, more convenient. Wide Application - Universal fit for Cars, SUVs, Bike and Bicycle, 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. Tyre Valve Dust Caps - Valve caps can protect valve against exposure to dirt and dust; Also can replace the original bad valve cap of the tyre.