10-pack 1.9 cm Metal Conduit Elbow Bearing Pulley Block with Two Plastic Wheels for Sliding Door Window Cabinet

10 pulleys in a single set. Made of iron and plastic, with ball bearings inside, for smooth and durable movement. Suitable for your wardrobe, bookcase, glass cabinet, and other office furniture. The wheel diameter is 19 mm. Please check the size of your furniture to ensure the pulley meets your needs before purchasing. This caster is designed for U-shaped rails. Diameter of each caster: 1.9 cm. Width between two casters (inner dimension): 2 cm. The casters have a small bracket to properly position and secure the door before fixing it. Even doors 2 and 50 meters high slide smoothly. Although small, it's large enough to support approximately 40 kg.