1、These bearings are made of stainless steel, rust‑proof and rigid, and are not easy to wear after repeated operations. 2、There are steel dust covers on both sides of the bearing to prevent dust and foreign objects from entering and prolong the service life. 3、Ball bearings have uniform hardness, double shielding can avoid the entry of contaminants and save lubricants. 4、The kit contains 10pcs S6200ZZ miniature bearings, which can be replaced and installed at any time, with strong practicability. 5、These mini bearings are standard in size and are often used in industrial manufacturing, woodworking machinery, etc. 10 x Bearing Item Type: BearingMaterial: Stainless steelModel: S6200ZZOuter Diameter: Approx. 30mm / 1.2inInner Diameter: Approx. 10mm / 0.4inHeight: Approx. 9mm / 0.4inApplicable Fields: Papermaking machinery, reduction gears, railway vehicle axles, steel mill gearbox bearing seats, rolling mill rolls, crushers, vibrating screens, printing machinery, woodworking machinery, various industrial reducers, vertical self-aligning bearing with base