Features ABS, BRASS MATERIAL: Made of premium ABS and brass material, this switch is high temperature resistant, corrosion resistant, which can be used under both cold and hot water conditions. SAFE TO USE: The electronic components are used as control devices to ensure that the product is completely enclosed and non sparking during use. EASY TO INSTALL: This water pump switch is small and compact in size, light in weight, you can complete the installation quickly and put the switch into use. LOW WATER PRESSURE START: The return spring is made of premium stainless steel material to achieve the function of starting the water pump at low water pressure. SPECIFICATION: This G3/4 to G1/2 universal adjustable switch is an ideal replacement for the old and damaged parts, pay attention to the details! Specification:Item Type: Water Pump Pressure Switch Material: ABS, Brass Specification: Universal adjustable type (G3/4 to G1/2) Inner Diameter: Approx. 25mm / 0.98in Outer Diameter: Approx. 20mm / 0.79in Rated Current: 2A Power: 150W Scope of Application: Automatic start and stop of booster pump Package List:1 x Switch 2 x Rubber Ring  Package List 1 x Switch 2 x Rubber Ring