1、Robust Construction: Our RV skid rollers are crafted from heavy duty steel, high hardness and rustproof, ensure long term durability. 2、Wide Application: These 2 pcs steel rollers are the perfect complement to low rise trailers, motorhomes, travel trailers and fifth wheels. 3、Function: Steel rollers will protect your vehicle from bottoming out for a long time, driving your RV on rainy or sunny days without worrying about damaging chassis. 4、Ball Bearing: The roller is designed with ball bearings to maintain longer working efficiency. Protect your trailer from hitting the bottom. 5、Size and Easy Installation: The weld on design of the rollers ensures a hassle free, each pulley measures approximately 2 x2 inch and the mounting frame measures approximately 3 x2 inch.