Adjustable pressure function: This is a water pump pressure control switch for perfect pressure control. When adjustable rise and fall thresholds are reached, a pressure switch with a 40-60 psi pressure setting range activates the electric water pump in the power circuit. Widely used: 1/4 inch internal thread NPT, standard well pump replacement switch, designed for all types of electric well pumps (jet, submersible, reciprocating, etc.). Premium material: the pressure control switch is made of high quality material with high strength and durability. The large contact can be opened when the pressure rises, extending the service life. Easy to use: water pressure control is easy to use, stable performance, motor protection, power saving, long-term use. Material: plastic colour: grey Package Contents: 3 x pressure switch for well pump Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.