Features:.CNC machined aluminum valve extension, 2 grams each.Rubber O-ring seals inside the valve to eliminate leakage.Adds 40 mm in length to any valve that lends removable core.It can be used with our valve without road camera.It can be used with any borrowed removable core tube.Sold by par.Removable valve cores not included DESCRIPTION:A pair of threaded valve extensions of 40 mm effective length for use with valves lends with removable valve core.Converts deep section rims for cameraless use using external threads to ensure the nut lends.The only external threaded valve extenders on the market.