This is a door pulley. Made of reliable nylon, copper and stainless steel materials, safe and durable. The smooth edges design ensures that the roller sits on the rails without easily scratching the door. Can be widely for cupboard, barn doors, kitchen doors, bathroom doors and more places to use. Features -Color:Silver -Material:Stainless steel, copper, nylon -Size:4.50X3.50X1.50cm/1.77X1.38X0.59in -Wheel inner diameter:22mm -Wheel slot width:5.2mm - Widely applied for sliding doors, cabinet rails, window rails, this window pulley is with excellent weighing capacity. - Small friction coefficient, vibration and the noise resistance and wear resistance for your better using. - Sturdy material makes this door wheel roller is strong and durable, not easy to corrode, help the door to keep balance. - Use sturdy structure to maintain separation between moving parts to reduce rotational friction and support radial. - Not easy to slide out, the sliding patio door roller is suitable for repeated use, safe to your door. Package list: 1 x Pulley Wheel