... ISO 9001 50mm Extruder Screw Barrel For PVC/R-PVC Cable For good plasticizing effect,we have ... demand. Product Parameter Product50mm Extruder Screw Barrel For PVC/R-PVC CableHardness after hardening and tempering HB260 °~ Nitrided ... type,mutant type,wave type,barrier type,double screen type,shunt type,separation type,exhaust type,pin type,mixed type,double-head type,three-head type,multi head type etc ...