Features 100% brand new and high quality. Made of bearing steel material, durable to use. Simple structure with stable performance, easy to use It can be used on joints that can withstand radial loads or combined loads of radial and axial forces. It can also be used on parts that can withstand axial loads, such as small power motors, automobile and tractor gearboxes, machine tool gearboxes, Gene Can be used in gearboxes, instrumentation, motors, household appliances, internal combustion engines, transportation vehicles, agricultural machinery, construction machinery, construction machinery, roller skates, yo-yo, etc Specification: Material: Bearing Steel Weight: Approx. 65g / 2.3oz Outer Diameter: Approx. 40mm / 1.6in Inner Diameter: Approx. 17mm / 0.7in Package List: 10Pcs Deep Groove Ball Bearings Package List