1973 NRM Pacemaker III 2.5" single-screw extruder, 30:1 L/D, two-stage, vented with custom vent, air-cooled, 40HP DC motor and drive, 120RPM maximum screw speed, gearbox ratio of 16.91:1, includes integrated 8-strand die on swing-away breaker plate/clamp, S/N 15727, 480/3/60, fair condition.