Item Type: Bearing Material: Stainless steel 440 Model: S6306Z Use Characteristic: High speed Rolling Element Type: Ball Number of Rolling Element: Single row Inner Diameter: Approx. 30mm / 1.2in Outer Diameter: Approx. 72mm / 2.8in Thickness: Approx. 19mm / 0.7in Package List 5 x Bearing 1These bearings are singlerow ball rolling type, which can improve the running stability and operate more smoothly. 2These bearings are made of imported materials and polished, which are rigid and can prolong their service life. 3Rolling bearings run fast and have low noise, which can reduce damage to mechanical equipment. 4Commonly used in automotive equipment, industrial machinery or household appliances, with a wide range of usage scenarios. 5Contains 5 replacement S6306Z bearings, which can be replaced and installed at any time, with strong practicability.