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 pressure setting range activates the electric water pump in the power circuit. Widely used: 1 or 4 inch internal thread NPT, standard pump replacement switch, designed for all types of electric pumps (jet, submersible, reciprocating, etc.). Premium : the pressure control switch is made of high quality with high strength and durability. The 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. : plastic colour: grey Package Contents: 1 x pressure switch for 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 a little different from the real thing. The measurement allowed error is 1-3cm.