20 Pack of 33mm Lug Nut Cover Chrome Plastic Rocket Spike Push On for Commercial Heavy Semi Trucks (Peterbilt, Kenworth, Volvo, Mack, International, Freightliner, Western Star) from Diesel Laptops 33 mm - Standard size for all commercial heavy & medium semi trucks (33 mm is the dimension of the lugnut that fits inside the cover) Push-On Item is made of plastic with a chrome color finish Height: 4-3/16&quot;