Primary Wheel Chock Application Fire Trucks, Width 8 1/2 in, Height 8 1/4 in, Depth 15 1/2 in, Urethane, Wheel Chock Surface Tread Grooved, Wheel Chock Style Single, Max. Vehicle Weight 80, 000 lb, Wheel Chock, Yellow, Standards NFPA 1901-1909, SAE-J348, Includes Aluminum Cleat, Max. Tire Diameter 46 in, Wheel Chock Base Tread Serrated. This item has been restricted from sale in the following state (s): []