Serial no: 508007. Two electric vibrators. One of the vibrators is for the live bottom, 1/2 HP electric vibrator. The other vibrator 0.12 HP for the feeder trough . Screw is powered by a 1 HP sew-eurodrive variable speed gear motor. Includes metalfab “better-weigh" controller. Start/stop switches and load cell junction boxes in nema 4x stainless steel enclosures. The posibin hopper has a 10"ø material inlet, 8"ø vent port, and two monitor bin level indicators. Screw feeder calibrated for powder activated carbon or material with similar density. Heavy duty construction.