Feature: 1. Come with steel dust‑proof covers on both sides to prevent dust and foreign objects from entering, and high temperature resistance 2. The product have simple configuration, high speed, low friction coefficient, vibration and noise 3. Ball bearings have uniform hardness, wear resistance, high temperature resistance and double shielding, which can avoid the entry of pollutants and save lubricants 4. Application areas contain papermaking machinery, reduction gears, railway vehicle axles, steel mill gearbox bearing seats, steel rolling mill rolls 5. Widely used for crushers, vibrating screens, printing machinery, woodworking machinery, various industrial reducers, vertical self‑aligning bearings with seat Specification: Item Type: Miniature Ball Bearings Material: Stainless steel Model: S6903ZZ Applicable 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 belt seat alignment Bearing Outer Diameter: Approx. 30mm / 1.2in Inner Diameter: Approx. 17mm / 0.7in Height: Approx. 7mm / 0.3in. Package List: 10 x Miniature Ball Bearings