SHAPE: Flanged Hex Bore Precision Ball Bearings have a bore to fit a Hex Shaft and are the best way to ensure smooth-running Hex Shafts for Machines, Wheels, ect. DIMENSIONS; HEX BORE INNER DIAMETER: 0.500 inch (12.7mm) OUTER DIAMETER: 1.125 inch (28.58mm) FLANGE OUTER DIAMETER: 1.225 inch (31.12mm) OVERALL WIDTH: 0.313 inch (7.59mm) FLANGE WIDTH: 0.063 inch (1.6mm) ABEC RATING: These Flanged Hex Bore Precision Ball Bearings are ABEC-1 Rated. The ABEC-1 rating provides a lower tolerance which allows the bearing to expand while still operating efficiently when significant heat it applied. Please ensure that the ABEC-1 rating of this Bearing is suitable for your needs. MULTI-APPLICATION: Flanged Hex Bore Ball Bearings may be used on any machine, electric motor, or wheel with a rotating Hex Shaft. This may include uses for Lawn Mowers, Wheel Barrows, DIY Electric Motorized Projects, Electric Bicycles & Skateboards, Carts, Electric Toys and Tools, Garden Tools, Home Appliances, and More EASY INSTALLATION: Simply take out the old damaged bearing, and push in our new Hex Bearing, your machine/wheel will now be working at full efficiency once again SPECIFICATIONS: Flanged Hex Bore Ball Bearings are the most effective way to make any machine's Hex Shaft smooth. They are cost-effective, durable, low noise, withstand high temperatures, and has an ABEC-1 rating CUSTOMER SERVICE: Customer satisfaction is our top priority, this means that if you're not satisfied with this product for any reason, you may return it and get a full refund for your item. In addition, we try our best to answer any questions our customers may have. MATERIAL: Steel ITEM WEIGHT: 0.052 pounds each COLOR: Silver PACKAGE CONTENT: 1 x Flanged Hex Bore Ball Bearing 1/2” Hex ID (10 Pack)