Metric and Inch sizes in kinds Good quality ... the cup, or outer ring; the tapered rollers, or rolling elements; and the cage, or roller retainer2. Bearing material ... in this series:1): Single-row tapered roller bearing (Metric size, Inch size)2): Double-rows tapered roller ... ...etc:3): Steel cage and Bronze cage4. Applications:Autos, Rolling mill, Mining, Metallurgy, Plastic machinery...etc;5. Package: ...