Pressure Switch, For Use With Grainger Item Number 1TDK2, 1TDJ9, 1TDK1, 4ZZ99, 3NXE3, 3WE18, 3NXE4, For Use With Mfr. Model Number GH-3505-0MDK, GH-3505-0MGH, GH-4004-0MAH, GPH-2000-0M1I, GPH-2000-0M1R, GPH-2500-0M1I, GPH-2500-0M1R, Fits Brand Mi-T-M