The N135WGB-ST-CAPC from Nascom is a stick on capsule switch / magnet set, center lead, zip cord, brown. The N135WG CAP C Series is our ground breaking CAP switch. Never drill in windows or doors again. The switch and magnet are so thin they will fit between the window sill and sash. When surface mounted, the smooth rounded edges and ultra-thin profile makes it almost disappear. The CAP switch is designed to protect all nonferrous (e.g. wood, aluminum and vinyl) doors and windows, in both residential and commercial settings. The N135WG CAP C, is the installer's choice of contact configuration where surface mount is required excellent air and side-to-side gaps are required to prevent false alarms caused by shifting or warping doors and windows.