Pressure Switch, Differential 1.0 to 3.5 psi, Range 6 to 60 psi, Port Type 1-Port 1/4 in FNPT, Contact Form SPDT, NEMA Rating 13, 3, 4, 4X, Actuation Type Diaphragm, Action Standard, Series B, Factory On/Off Setting 90 Percent of Range, AC Contact...