Specification:Item Type: Water Pump Pressure SwitchMaterial: Zinc AlloySpecification: 1.5~2.2kg ( Suitable for 250W 300W 370W )Interface Thread Specification: 3 / 8inProduct Use: Automatic Cold and Hot Water Self Priming Booster Pumps of Major Domestic and Foreign Brands, for Internal and External Threaded Elbows.Package List:1 x Water Pump Pressure Switch Note:Automatic cold and hot water self priming booster pumps of major domestic and foreign brands, for internal and external threaded elbows.