Alpha OH193 3 Gang Flush Housing - Steel

3 Gang Flush Housing - Steel Use OF193 Series Panel Frame. The Alpha Communications® / TekTone OH193 backbox/housings are made of heavy gauge galvanized steel. They designed to be used with aluminum frames.These backboxes/housings a variety apartment entry intercom and video lobby modules, as well specialty annunciator modules. Electrical knockouts provided on top, bottom back these units.