
Material: V-Groove Roller is made of high quality galvanized steel, strong and durable, corrosion resistant, waterproof Dimensions: 31MM wheel diameter. Suitable for 90 degree V-panels (please confirm the size of your V-panels before ordering) Loading Capacity: Permissible loading capacity of 200KG per roller, easy to carry heavy high door Roll laaring: Two roller bearings glide smoothly to facilitate the sliding of the door Multi-purpose: Match high-performance sliding door, factory door, industrial mechanical railway engineering, dog door, garage door, garden door