Bearing material: bearing steelExternal profile: U-shapedSize:Inner gap :6mm/ Outer diameter :30mm/ trench backside :23.8mm/ Thickness :10mmWeight: About 10gColor: BlackPackage Contents:1 pcs U Groove Roller PulleyFeatures:1.Sliding door and window roller bearing metallic 626 bearing is made from positive steel, has good corrosion resistance and put on resistance, can withstand many of load and pressure, to ensure the durability and lifetime of the product.2. This bearing design is exquisite, extremely suitable for the use of sliding doors and Windows, may give stable, noiseless rotation and smooth operation, improve the outlet and closing ride of doors and Windows.3.626 bearing size is accurate, appropriate for most sliding doors and Windows, and set up is simple, no legit tools, would be changed and installed at home.4. Sliding door and window roller bearing metal 626 bearing is cheap in price and cost-effective, which is a cost-effective solution for households and commercial places. In addition, its high energy and sturdiness additionally enormously lower the desire for replacement and maintenance, saving money.5. In addition to traditional sliding doorways and Windows, 626 bearings is also used for other goods that want bearings, reminiscent of skateboards, pulleys, usual family appliances, etc., with a variety of applicability.Notes:1.Please enable 1-2cm differences because of manual measurement, thanks.2.Please understand due to mild irradiation or computer demonstrate difference, so I can't warrantly images and real coloration is the same.