These wheel chocks are made of strong, durable UV resistant hard plastic. They come in a yellow colour for good visibilty. These wheel chocks prevent caravans or vehicles from moving on a site or on the road in an emergency. Chocks are placed for safety in addition to setting the brakes. The bottom surface has a molded pattern to enhance grip with the ground. One edge of the wedge has a concave profile to contour to the wheel and increase the force necessary to overrun the chock. These chocks are also ideal for securing the vehicle at the front wheels when the rear axle is jacked off the ground. The Caravan Supermarket has 35 years experience in the caravan and camping industry and is based in Birmingham. The Caravan Supermarket is committed to offering its caravan and camping customers a secure and enjoyable shopping experience. We provide quality caravan and camping accessories at clear and competitive prices by including VAT in the marked price and by offering a free delivery. We give our customers a great service along with expert advice and peace of mind that comes from a 30 day no hassle returns policy. We engender the holiday spirit and want to play a small part in enriching that spirit.