Sold as a 25 pack
The N25WGW-M from Nascom is a Stick on Magnet, Mini D1/4" X H1/4" X L1-1/4", White. The N25WG Series, 1/4" stick on contact, protects all nonferrous (e.g. wood, aluminum and vinyl) doors and windows, in both residential and commercial settings. The N25WG is the installers's choice of contact configuration where excellent air and side-to-side gap are required to prevent false alarms caused by shifting or warping doors and windows.