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 curler bearing steel 626 bearing is manufactured from fantastic steel, has good corrosion resistance and put on resistance, can stand up to many of load and pressure, to ensure the sturdiness and lifetime of the product.2. This bearing design is exquisite, extremely appropriate for the use of sliding doorways and Windows, can give stable, noiseless rotation and delicate operation, improve the opening and shutting journey of doorways and Windows.3.626 bearing size is accurate, suitable for many sliding doorways and Windows, and set up is simple, no professional tools, could be replaced and installed at home.4. Sliding door and window curler bearing metal 626 bearing is cheap in price and cost-effective, which is a cost-effective answer for families and commercial places. In addition, its excessive energy and sturdiness also enormously minimize the will for replacement and maintenance, saving money.5. In addition to traditional sliding doors and Windows, 626 bearings can also be used for different goods that want bearings, akin to skateboards, pulleys, regular family appliances, etc., with quite a lot of applicability.Notes:1.Please allow 1-2cm differences due to manual measurement, thanks.2.Please understand due to light irradiation or computer display difference, so I can not warrantly pictures and genuine coloration is the same.