These are some door pulleys. Made of reliable copper and stainless steel materials, safe and durable. The smooth edges design ensures that the rollers sit 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:Multi -Material:Stainless steel, copper -Size:7.10X3.50X1.90cm/2.79X1.38X0.75in -Outer diameter:3.50cm/1.38inch. -Inner diameter:2.90cm/1.14inch. -Width of inner slot:5.80cm/2.28inch. -Height adjustment:4.10-4.70cm/1.61-1.85inch. - Widely applied for sliding doors, cabinet rails, window rails, these window pulleys are with excellent weighing capacity. - Small friction coefficient, vibration and the noise, pressure resistance and wear resistance for your better using. - Premium copper and stainless steel material makes these door wheel rollers strong and durable, not easy to corrode, help the door to keep balance. - Use double bearing 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 Window Pulley