Drop through metal detector by fortress technologies inc., model "fortress phanthom", serial # g-10690-6755. Features drop through opening of 2" x 8" x 12" fall length, operates on 120 volt/1 phase, touch sensitive factory controls, formerly used with powder filler and cantilievered mounted from 4. 5" diameter filler post, mounting hardware included. Formerly used in pharmaceutical service. See video test on our youtube channel at https://youtu. Be/qqbiasrygfa