Features: 1Professional manufacturing high accuracy and not easy to break solid and durable. 2Easy installation a direct replacement for the old and broken one. 3Good load bearing high strength material can withstand 150kg 4High sensitivity stable performance long time service. 5Made of high quality steel and POM material for durability and stability. Specification: Features: 1. Made of high quality steel and POM material for durability and stability.2. Professional manufacturing high accuracy and not easy to break solid and durable.3. Easy installation a direct replacement for the old and broken one.4. Good load bearing high strength material can withstand 150kg5. High sensitivity stable performance long time service. Specification: Condition:100% Brand New Material:Steel and POM Color: As shown in the picture Wheel Diameter: Approx.2cm / 0.8in Overall Length: Approx.7cm / 2.8in Base Length: Approx.13cm / 5.1in Weight: Approx.151g/5.3oz Package List: 1 x SetHanging Wheels Note: The wheels are integrally formed by CNC lathes which are different from the compression-molded wheels. The compression-molded wheels are affected by the high temperature during the process. The oil inside the bearings will evaporate at high temperatures which affects the bearing and life of the wheels. The starting hanging wheel has not been processed by high temperature. In order to ensure the quality and service life we use special technology to inlay the bearing to achieve the zero loss of the bearing.