PT211120A Pres Air Trol Pressure Switch, PresAirTrol Center Spout, 21A, 1/8"b, DPDT PT21120A

PR21120A Pres Air Trol Pressure Switch, PresAirTrol Side Spout, 21A, 1/8"b, DPDT Adjustable from 1-5psi, 1/8" side nipple, mounts to panel with self-tapping #4 screws. Rated at 21 amps

PT11120A Pres Air Trol Pressure Switch, PresAirTrol Center Spout, 21A, 1/8"b, SPDT   Adjustable 1-5psi, 1/2"thd panel mount only, rated at 21 ampsP:A:T# P

PR11120A Pres Air Trol Pressure Switch, PresAirTrol Side Spout, 21A, 1/8"b, SPDT Adjustable from 1-5psi, 1/8" side nipple, mounts to panel with self-tapping #4 screws. Rated at 21 amps

610913 Pres Air Trol Pressure Switch, PresAirTrol Thd Stem, 21A, 1/8"mpt, DPDT PM21120A Adjustable from 1-5psi, 1/8"npt or 1/2" panel mount, rated at 21 amps

VS12506E Pres Air Trol Vacuum Switch, PresAirTrol VS11106E, 21A, 1/8"mpt Vacuum Switch1/8"npt, no panel mount, 21 amp