Features High Pressure Resistance: Withstands high pressure without water seepage or leakage, ensuring reliable performance and durability. Zinc Alloy Base: The bottom of the switch is made of zinc alloy, providing durability and corrosion resistance for long-lasting use. Wide Compatibility: Suitable for most self-priming bo pumps, compatible with 550W and 750W water pumps for versatile application. Stable Double Clutch: Features a silver material double clutch with 15-sided points, ensuring stability and reliability. Ensured Strength and Quality: The double clutch ensures the strength of the switch, delivering stable and reliable performance for your water pump system. Features: 1、This water pump pressure switch controller can withstand high pressure without water seepage, water leakage and other problems. 2、The bottom of the switch is made of zinc alloy, which is and corrosion？resistant. 3、This switch is suitable for most self？priming bo pumps, suitable for 550W and 750W water pumps. 4、It adopts silver material double clutch, ( the is 15 sided point is more stable than single point ). 5、The double clutch can ensure the strength of the switch, and the quality is more stable and reliable. Specification: Item Type: Water Pump Pressure Switch Material: Zinc Alloy Specification: 2.2~3.0bar ( Suitable for 550W / 750W ) Interface Thread Specification: Double 3/8NPT Inner Wire Product Use: Automatic Cold And Hot Water Self Priming Bo Pumps Of Major Domestic And foreign Brands, for Female And Male Threaded Elbows. (for HY, for Well, for LG, for Walrus, for Hanjin, for SUPR^SUNY, for SHIMGE, for LEO, for ESE, for SNOW-MOTER, for Xinxishan) Package List: 1 x Water Pump Pressure Switch Note: Automatic cold and hot water self priming bo pumps of major domestic and foreign brands, for female and male threaded elbows. Package List 1 x Water Pump Pressure Switch