... wheels safely in place, and prevent slippage Wheel ramp&chock big ramp size: 64x22x14cm, chock:16x12x10.5cm, mat:16x10x0.5cm ... . Each big ramp front side with a permanent sticker,ProductsMaterial: PP resin, ... ramps and chocks to be linked. 2,the only ramp with a solid bottom to prevent sinkage into soft ... a new "lead in " moulding to prevent slippage RAMP