Nascom's N78C Series is a 3/4" recessed wide gap door contact designed for residential, commercial and industrial steel and wood door applications.The N78C is the installer's choice of contact configuration because the contact set is designed to cut installation times and helps to prevent false alarms caused by shifting or warping doors.The N78C Series is designed for installation in every type of hinged door including wood doors.FEATURESSNAP FIT ON STEEL - NO GLUE REQUIRED12" 22AWG WIRE LEADSWIDE GAP - N35 NdFeB RARE EARTH MAGNETENCAPSULATED HERMETICALLY SEALED CONTACTSPOLYPROPYLENE HOUSINGSLISTED TO UL634 STANDARD