This magnetic probe is compatible with a wide range of instruments, including 190 Series, 3540 FC, 1736 and 1738, 434-II and 435-II, 437 Series, and 438-II. The MP1 Magnet Probe is an accessory featuring a magnetic tip designed for use with 4 mm safety test leads. It is rated CAT IV 600 V and CAT III 1000 V, ensuring safety and suitability for various electrical applications. The probe can handle a maximum current of 4 A, making it suitable for both high and low current measurements. Its design allows it to fit into recessed screw holes with a diameter of at least 6 mm. Color: Black Material: Plastic Package Contents: 4 x Magnet Test Probe Note: The actual product may have slight color variations due to lighting and display differences. These variations do not affect functionality. Measurement error may be +/- 1-3 cm.