Description Overview 3 1/2” nrm pm iv 32:1 extruder 32:1 l.d. New 1988 Specifications Gear box ratio: 15.12.1 100 hp dc motor and drive Vented and plugged Water cooled 5 barrel zones 4 die zones Included Components Spare two stage screw with mixer for open vent Open vent discharge adapter with clamp Extech screen changer with power pack