Features 4 WHEEL DESIGN: The pulley assembly is 4 wheels design, has a reliable structure, which ensures uniform stress and strong stability. 4 Wheel Design: The Pulley Assembly Is 4 Wheels Design, Has A Reliable Structure, Which Ensures Uniform Stress And Strong Stability. Excellent Bearing: Adopts Deep Groove Ball Bearing, With Stable Rolling, High Accuracy, And No Noise, The Bearing Capacity Is Up to 1256kg. CNC Processing: Forged with Fine Cnc Technology, This Pulley Assembly Has A Glossy Finish, Greatly Improving The Smoothness of Work. Various Advantages: Our Stainless Steel Pulley Assemblies Are Durable, Corrosion-Resistant, Oxidation-Resistant, High-Temperature Resistant, Small In Size, Lightweight And Impact-Resistant. Specification: Item Type: Pulley Assembly Material: Stainless Steel Color: Silver Use: Can be used for home movable doors, wardrobe doors, large iron doors, curtains, automation equipment pulley components, factory pulley. Package List: 1 x Pulley Assembly 1 x Screw 3 x Nuts Package List 1 x Pulley Assembly 1 x Screw 3 x Nuts