2 pcs magnets 20mm x 10mm x 3mm for reed switches operating (WeHonest)

Buy It Now Price is for 2 pcs magnetsstick your magnet like above.instead of placing the reed switch in the middle of your track, please place it near your track as showed below.Characteristicsize of magnet: 20mm x 10mm x 3mm. Brand new use them to drive the reed switches you may use more magnets at the same to get stronger magnetPRODUCT  DESCRIPTION when magnets pass by reed switches, it will change the position of the reed switches, and the reed switches will turn back to normal position again when the magnet leave. suitable for auto control....