Solenoid Valve Check Tool Portable Sturdy Indicator Tool AC Coil Fast Detector Key Ring Style Built-in Indicator Solenoid Tool Description: Efficient Coil Testing: This solenoid tool is designed for quick and efficient testing of AC coils, making it an essential accessory for HVAC professionals and enthusiasts _x000D_ Compact Design: With a compact size of 5cmx1.6cm, this coil tester is easy to carry and store, ensuring convenience during fieldwork or in your toolbox _x000D_ Sturdy Material: Made from PP, this testing tool offers durability and reliability for long term use in various environments _x000D_ Versatile Application: Ideal for checking refrigeration solenoid valves, this keychain style tester provides versatility across different coil types and applications _x000D_ Easy to Use Tool: Its simple design allows even beginners to quickly assess the functionality of electromagnetic valve coils without any hassle _x000D_ Size Chart: 5cmx1.6cm/1.97inchx0.63inch Package Includes: 1x Rotation Tester and AC Detector Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement. _x000D_