Primary Wheel Chock Application Aircrafts, Width 5 in, Height 3 1/4 in, Depth 15 in, Urethane, Wheel Chock Surface Tread Smooth, Wheel Chock Style Double with Rope or Chain, Max. Vehicle Weight Not Rated, Wheel Chock, Yellow, Includes Rope, Wheel Chock Base Tread Smooth, 1 Pair