planetary extruder screw in high wearing and super wearing,service in long life,can be replaced with other ... HT190,HT200,HT220,HT240 and HT250. The screw rod are in long lasts using,can wear resistance,and it ... with single-screw and double-screw extruder,there are more than 6 screws in extrusion side,it is in large ... ,UAE and other countries.If you are interested in,please feel free to contact us.We will ...