This Draper HGV Wheel Chock provides expert quality & is ideal for stabilizing HGVs whilst parked. The chock is 250mm in size & perfect for wheels larger than 920mm in diameter. This product is manufactured from heavy duty, HDPE plastic that is anti-slip, non-sparking, highly visible & weatherproof. This model conforms to DIN 76051-D53Z & complies with ADR regulations.