Primary Wheel Chock Application Fire Trucks, Width 11 1/4 in, Height 12 1/4 in, Depth 21 in, Urethane, Wheel Chock Surface Tread Grooved, Wheel Chock Style Single, Max. Vehicle Weight 150,000 lb, Wheel Chock, Yellow, Standards NFPA 1901-1909, SAE-J348,...