wood car grate made of hardwood ISO9001:2000 OEM and competitive price thickness:30-80mm ... , Solid structure, it can take the pressure of 5 tons' car weightB, Freely assembleC, Made of elm, one of the most hardest timberD, Impact resistangtE ... , Nylon rope connection of each bar and blockF, Plalistic stopper at each end of the grate wood ...