Snap-In Tire Valve Stem TR414 1.5" - CHROME (4 Pcs Pack) 4 x SNAP-IN TR414 Rubber (Chrome Cover) Tire Valve Stem - 1 1/2" This is a high quality Rubber Valve Stem, TR414 that fits most tubeless tire rims. It will fit on most rims with an 11.5mm (.453") valve stem hole. The Valve has a 15 mm diameter were it mounts on the rim, not at the bottom. Great adition to your chrome wheels.