Adjustable from 1-5psi, 1/8"npt or 1/2" panel mount, rated at 21 amps Hergair# 6741 P:A:T# PM11120A SPDT Manufacturer - PresAirTrol Switch Type - Pressure Pressure Switch Rating - 1 to 5 psi PSI Rating - 1 to 5 psi Pressure Switch Amperage - 21A Thread/Pan Material - Plastic Plumbing Connection Size - 1/8" Plumbing Connection Type - Male Pipe Thread (mpt), Male National Pipe Thread (mnpt) Pole/Throw - Single Pole Double Throw (spdt) Pan Material - Plastic