Save when you buy the 2 Pack!Alarm contactWhiteSPDT magnetic switch, Reed Switch.5A 20v 10 watt max30-10072 White SPDT N.O./N.C. MAGNETIC REED SWITCH Normally open w/o magnet Normally closed w/o magnet Mounting Center: 2.125".Brand: Philmore LKG, Model: 30-10071, Color: White