Alpha OH191 1 Gang Flush Housing - Steel

1 Gang Flush Housing - Steel Use OF191 Series Panel Frame. The Alpha Communications® / TekTone OH191 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 units.