plastic wheel chock with anti-slip rubber bottom; suitable for caravan, RV, motorhome, light duty trailer etc. We have more than 20 types of wheel chock for various vehicles. please visit our website or contact me for more information. I believe we have the one you are interested. Qingdao Runbell Co., Ltd. Tel: 86-532-86873761 Fax: 86-532-86873760 http://www.runbell.com Email: [email protected]