The 1086W-M from Interlogix is a surface screw mount, open loop, wide gap, brown. The GE Security 1085 Series surface mount magnetic contacts are designed for use in installations where a small, sealed unit is required. The reed switch is totally encapsulated in GE Security's exclusive polyurethane potting compound preventing moisture from entering the switch and causing false alarms.The 5/8-inch standard gap distance allows for fast, easy installation and prevents false alarms from loose fitting doors. Recessed mounting holes make for clean-looking installations. Wide gap models are available.