... Parameter ProductNylon/PA6/PA66/PEEK extruder screw and barrelHardness after hardening and tempering HB260 ... screw Gradual 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 ... airPackingPlywood boxThe Reason For Choose DEMAJI SCREW:*Primary Quality*Reasonable Price*Flexible Manufacturing ...