Features The wheels adopt ball bearings, which are flexible to slide, small in size and good in performance. Suitable for furniture hardware fittings, mobile doors and window, wall cabinets, wardrobe plastic steel doors, etc. With a spring‑back structure, it will not cause doors and window to collide with the wall due to excessive force. Strict quality control and quality assurance, high safety factor, can be used with peace of mind. Using high‑quality Ti alloy materials, strong and durable, has a long service life. Specification: Item Type: Pulley Wheel Material: Nylon, Ti alloy Color: Green Scope of Application: Plastic steel door, wardrobe door, wall cabinet convex pulley Package List: 2 x Upper Wheel 2 x Lower Wheel 4 x Screw 2x Bolts Package List 2 x Upper Wheel 2 x Lower Wheel 4 x Screw 2 x Bolts