Detailed Product Description Features: 1) Mainly used in the field of oil drill, plane, shipping, automobile, chemical industry and build engineering.2) Better to be used to de-rust the rust on the inner-wall of pipes between diameter 80-300mm with cleaning grade to Sa 2.5.3) Grinding materials matched with the cleaner: Shot, ore sand.4) Abrasive grain mesh: 25 and 10 ( 0.71mm and 2mm ).