Prevents trailer from rolling. Folds flat for storage in minimal space. Protection against slippage anytime a trailer needs to stay put. Strong heavy gauge metal chocks fold flat for transport and setup in seconds. convenient carry package of two. Each folded: 5" x 6" x 1-1/4". Each set up: 5" x 6" x 4".

 PROP 65 WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information, visit www.P65Warnings.ca.gov