Bearing material: bearing steelExternal profile: U-shapedSize:Inner gap :6mm/ Outer diameter :30mm/ trench bottom :23.8mm/ Thickness :10mmWeight: About 10gColor: BlackPackage Contents:1 pcs U Groove Roller PulleyFeatures:1.Sliding door and window roller bearing steel 626 bearing is fabricated from superb steel, has good corrosion resistance and put on resistance, can stand up to a lot of load and pressure, to guarantee the sturdiness and life of the product.2. This bearing design is exquisite, extremely suitable for the use of sliding doorways and Windows, can give stable, noiseless rotation and soft operation, upgrade the outlet and shutting trip of doors and Windows.3.626 bearing size is accurate, suitable for most sliding doors and Windows, and installation is simple, no reliable tools, can be replaced and put in at home.4. Sliding door and window curler bearing metal 626 bearing is cheap in payment and cost-effective, which is a cost-effective solution for households and advertisement places. In addition, its excessive energy and sturdiness also drastically reduce the need for replacement and maintenance, saving money.5. In addition to traditional sliding doorways and Windows, 626 bearings can be used for other items that desire bearings, equivalent to skateboards, pulleys, normal family appliances, etc., with a wide range of applicability.Notes:1.Please enable 1-2cm variations thanks to manual measurement, thanks.2.Please perceive due to the gentle irradiation or computer show difference, so I can't guarantee images and genuine coloration is the same.