Stainless Steel 4 Hose Airless Wheel Cover Mount Valve Extenders Kit for 16 inch to 19.5 inch Wheel Covers. Wheel Masters Airless stainless steel wheel covers is for tire inflators that contain with 0 internal pressure and does not leak even if cut. 4 Hose kit for 16 inch to 19.5 inch tires. Airless stainless steel braided hose. Safe travel begins with safe tires, which means regularly checking tire pressure. Properly inflated tires improve gas mileage, increase safety, increase tire life and imporves vehicle handling. Easy to install, no special tools required, the hoses attach to your existing valve stem (no need to remove valve core) allowing proper inflation and pressure checks in seconds. Each kit comes complete with everything you need for the specific wheel application. These heavy duty inflators are constructed of high quality 2-ply rubber tubing reinforced with a tough nylon braiding.