Spec Sheet Preview: The NX87_ surface housings are designed to be used with the Alpha Communications® / Golmar™ Nexa modular series door entry stations and system annunciators. There are five (5) configurations available in single and double-width varieties. For larger configurations, multiple NX87_ series housings may be mounted alongside each other. The NX87_ surface housings are constructed of stainless steel, and all have a built-in rainhood.