Alpha OH203 3 Gang Flush Housing - Steel

3 Gang Flush Housing - Steel Use with OF203 /G Series Frame. The Alpha Communications® / TekTone OH203 backbox housings are made of heavy gauge galvanized steel. They designed to be used aluminum panel and master annunciator frames. These backboxes a variety apartment entry intercom video lobby modules, as well nurse-call, emergency-call specialty modules. is open at back housing, allow for wire entry.