Item Type: Water Pump Pressure Switch Material: Zinc Alloy Specification: 1.5~2.2kg ( Suitable for 250W 300W 370W ) Interface Thread Specification: 3 / 8in Product 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 Automatic cold and hot water self priming booster pumps of major domestic and foreign brands, for internal and external threaded elbows. 1The bottom of the switch is made of zinc alloy, which is durable and corrosionresistant. 2This water pump pressure switch controller can withstand high pressure without water seepage, water leakage and other problems. 3It adopts silver material double contact clutch, ( the contact is 15 sided contact point is more stable than single point contact ). 4The double contact clutch can ensure the strength of the switch, and the quality is more stable and reliable. 5This switch is suitable for automatic cold and hot water selfpriming booster pumps of major domestic and foreign brands.