... 2mm-16mm alloy steel ,stainless steel Used in various ring-pellet mills (Made in China and oversea CPM, Buhler ,Munch ... , fish feed, cow feed and sawdust pellet ,straw pellet ,and fertilizer pellet Size of roller :groove roller, dimpling rollerMaterials: alloy steel ,stainless steelTechnical ... hole machining Vacuum hardening high strengthOptimum arrangementfor specified application pellet mill roller