internal gear internal ring geat application:bakery equipment,light-duty appication material:stainless steel internal gearsainless steel gearmaterial:casting steel,forging steel, casting iron,steel alloy(30CrMnSi,20Cr ,9310,4303and so on)exoit material:brass,bronze,phenolic,nylon,delrin and othersprocessing:machine turning,machining milling,grinding,finish,heat treatment available finish:. ...