Description: Material: Constructed from pp material, this rotation tester and ac detection ensures long-last performance and reliability in various working conditions Product Size: With dimensions of 5cmx1.6cm, 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 Specification: Material: PP Size Chart: 5cmx1.6cm/1.97inchx0.63inch Package Includes: 1 Piece Rotation Tester and AC Detection Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.