Material: Constructed from plastic material,this rotation tester and ac detection ensures long-last performance and reliability in various working conditions. Product Size: this solenoid valve coil detection tool is compact and portable, allowing for easy storage and convenient use. Efficient Coil Testing: This rotation tester and ac detection for circulating pump is designed for quick and effective testing of AC coils, making it an essential accessory for refrigeration solenoid valve diagnostics. Portable:Small enough to fit on a key-ring, this tester is an essential item that every plumber or heating contractor should have, enabling quick checks of pump use and rotation direction. Versatile: In addition to testing circulation pump, this device can also check the use of oil burner solenoid valves, making it a multi-functional tool for various heating applications. Color: As Shown Material: plastic Package Contents: 1 x detector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.