25-150mm barrel diamerers,20:1 to 40:1 L/D, double reduction helical gear reducer with heavy duty thrust bearling, extended bimetallic barrel liners with cutaway feed section and water cooling jacket, bolt on or C-clamp front flanges with optional purge valves, variety of barrel heaters,air,oil or water cooling of the barrel,AC or DC drives per customer request,stainless steel hoppers, custom designed feed screws,hitemp versions available.