1.ball bearing 2.ZrO2, Si3N4, SiC and Al2O3 3.single-row bearing 4. Import bearing 5.ISO9001 ceramic bearings and plastic bearings with Corrosion and Oven-resistant Features, Available in Various Sizes Model Number:Fullceramic bearings and plastic bearingsMaterials: ZrO2, Si3N4, SiC and Al2O3Oven-resistant and wearableCan be used in extreme badly environmentHigh speed bearings: 12,000 and 75, ...