The very small reed contact M5 is a spare part for the included speedometer sensors.
The VA reed contact is suitable for all motogadget instruments. High industrial quality (IP68). It reacts to magnets on rotating parts.
--#9007032
Thread size M5 x 0.5 (fine thread), length 22 mm, including two screw nuts. Cable length 150 cm. 2 small strong neodymium magnets are included.