1、Premium Design: A 2 position 3 way solenoid valve with 0.04um mirror surface inner wall, with a more durable debugging button for smooth replacement and low loss. The coil with sufficient turns and power is not prone to overheating during long term operation. 2、Stable Working: Self lubricating sealing ring with 4 ring accuracy valve stem. High accuracy pilot head responds to high frequency without jamming for 5 seconds every time. 3、Standard Size: Designed to have 1/8in NPT outlet and inlet, also comes with 5 times per second maximum action frequency, very efficient and reliable. 4、The Working Principle: When the coil is powered off, the valve remains open, and it is closed when powered on, quick in response. 5、Easy Replacement: Easy disassembly and replacement of coils. The inner core nut can be removed without the need for tools, making coil replacement simple and convenient.