Use it as a tire chock for tandem wheel trailers or as a tongue chock for your trailer tongue jack. Sturdy yet lightweight, it keeps tires from rolling. 2000 lb. capacity. Made of durable, weather-resistant structural foam thats lighter than wood or metal and wont rot, rust or corrode. Non-skid base. 17 ¾"L x 6 ½"H x 4 ½"W. | Hopkins Manufacturing Heavy-Duty Chock & Block