1.bearing bushing/engine bearing bushing 2.High Density,Zero Defects,Easy Cutting ... Cast Iron Tube (ASTM A48 class 30,40,50) ---Matrix: ferrite+pearlite ---σb=150-350 Mpa, HB=150-240 ... plug, suction vitta Railway vehicle bogie bush, braking system bushing Metallurgical equipmentcasting lift tube ,suction tube, thermocouple protect ... Mine mechinanismwear resist sleeve, engine cylinder bearing bushing