DescriptionThese are some door groove pulleys. Made of nylon 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 to use.Features-Color:Red. -Material:Nylon. -Size:2.60X2.60X1.20cm/1.02X1.02X0.47in. -Hole diameter:0.6cm/0.24inch. - Widely applied for sliding doors, cabinet rails, window rails, with excellent weighing capacity. - Small friction coefficient, vibration and the noise, pressure resistance and wear resistance for your better using. - Premium nylon material is strong and durable, not easy to corrode, help the door to keep balance. - Use rolling elements to maintain separation between moving parts to reduce rotational friction and support radial. - Deep U groove design, not easy to slide out, suitable for repeated use, safe to your door.