Honeywell Pressuretrol Pressure Controller With additive differential, Model: PA404A, 1/4 in Nominal, Female Pipe Thread Connection, Snap Switching Action, Contact Configuration: SPST, 20 lb/sq-in, 0.5 to 9 lb/sq-in Operating, 1 to 5 lb/sq-in Adjustable Differential, 0.25 A at 0.25 to 12 VDC, 120 VAC, Resistive: 8.3 A, 240 VAC, Resistive: 8.3 A, 277 VAC, Resistive 7.2 A Contact Rating, 150 deg F Ambient, 4-15/32 in H x 3-3/8 in W x 2-1/4 in D