5pcs Recessed NC Security Alarm Door Window Contact Sensor Magnetic Reed Switch Lamp Guards Self-adhesive number stickers are efficient

Self-adhesive number stickers are efficient to target and identify anything you need to mark

1* JR male

Fit Mounting Screw Dia: 3

Provide solderless gapless connection for both waterproof and non-waterproof LED strip lights

The red line is to control the upper ball valve (threaded down)

5pcs Recessed NC Security Alarm Door Window Contact Sensor Magnetic Reed Switch Lamp Guards Self-adhesive number stickers are efficientNC means Normally Closed: When the magnet together, the circuit is conductive( light on ); when the magnet separate, the circuit is not conductive ( light off ). When make order,pls check carefully! The reed switch is an electrical switch operated by an applied magnetic field. Designed for use with alarm systems. Great for use in family and factory window, door. etc.