... Spherical Roller Bearings (21000, 22000 and 23000 series)3. Tapered Roller Bearings (30000 series and Inch series)4. Pillow Block Ball Bearings (UCP, UCF ... groove ball bearing2.Place of Origin: China (Mainland)3.Model Number: 60xx, 62xx, 63xx, 64xx, 16xxx, 16xx, R series, etc 4.Quality: ... ABEC-1, 3, 5, Z1V1 Z2V2 Z3V3, EMQ5.Material: Chrome steel ...