The Napco FWC-FSLC-SMK6B bases are designed specifically for use with the Napco Analog models FWCFSLC-SMK and FWC-FSLC-HEAT. The FWC-FSLC-SMK6B common mounting base allows for complete compatibility for all of the Napco Addressable Series Analog sensors. The bases are lightweight and very thin, providing a low profile once installed. The solder-less screw terminals enable quick and easy wiring connections.