electro-magnetic iron joint ring 1.high accuracy 2.OEM offered 3.longer ... life 4.quick delivery and low price always electro-magnetic iron circle joint ring machining part namematerialdimension(inch)standardjoint ringelectro-magnetic irond ... ,press ,engine lathe ,CNC center and meter lathe materials capability:cast iron ,ductile iron,carbon steel ,alloy steel, ordinary steel ,aluminum ,brass and ...