5Pcs 4*28mm Magnetic Reed Switch Sensor Normally Open DIY Green Glass 4x28MM NO Original Contact Induction
https://www.vogueparade.com/shopping/EN/4003/1/1005003692648538/5pcs-428mm-magnetic-reed-switch-sensor-normally-open-diy-green-glass-4x28mm-no-original-contact-induction//