Set of 4 Wheels for Door or Window, Steel Ball Bearing Pulley, 10 x 40 x 10 mm, White Plastic, Round Wheel, Load Capacity 83 kg

Made of bearing steel and engineering plastic. OD: 10 mm, ID: 50 mm, thickness: 10 mm, pulley sphere curvature radius: 5 mm, load: 83 kg. Suitable for doors and windows. The ball arc pulley has the function of supporting the mechanical rotation body, reducing the friction coefficient when moving, ensuring stable operation and reducing noise. The product is equipped with a key that can fix the pulley very well, it is not easy to fall off and has strong stability.