Used to counteract tyres becoming oval-shaped when the vehicle is parked for a longer period of time. For wheels Ø 250–500 mm. Used at camping sites by securing the underlay to the ground with tent nails or as a check block in the garage by bolting the underlay to the floor. For caravans, trailers, enthusiasts' cars and other other vehicles. Supplied in 2-pack. Dimensions: 440 x 200 x 40 mm. Weight: 0.5 kg each.