LinkMejor 2 Pack Solenoid Tester, Pump Rotation and AC Field Detector

Features: Professional Tools: If you work on HVACR systems, this little solenoid tool is excellent for testing solenoid coils. If the solenoid coil is energized, and this solenoid tester is anywhere near it, it will spin rapidly. Applicability: This solenoid tester works well for indicating rotation with different brand circulator pumps, including 1/10hp pumps and even 75hp pumps. It will always sense the magnetic field of any small motor. Specifications: Material: plastic, magnet Color: mainly white Size: 2.5 x 0.8 inch/ 6.3 x 2 cm Package includes: 2 x Solenoid testers Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays