... including high density,zero deficiency,close final shape(tube),superb wear resistance,high purity,excellent machinability ... Iron...III. Specification: ---Cross-Section:Round,Rectangle,Elliptic,Hexagonal ---OD:60-320mm,Thickness:8-35mmOur ... braking system bushing Metallurgical equipmentcasting lift tube ,suction tube, thermocouple protect tube Air-condition compression machinerolling piston ring ...