Buy It Now Price is for 10 pcs sensitive Reed Switches( Normally Open ) + 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.body size of reed switch: Ø 2mm x 10mm.total lenth of reed switch: 41mm. Reed switch Made in Russia and very high quality.Brand newPRODUCT DESCRIPTION the reed switch is normally open ( OFF ), when magnet pass by, it will turn to ON position, and it will turn back to OFF position again when the magnet leave. suitable for auto co...