Spec Sheet Preview: The BM series blank modules are designed to be used with Alpha Communications® / S.T.R.™ modular series door entry stations and annunciator stations. The BM series blank modules are used to fill an unused module on the modular door station(s). All BM blank modules are available in three (3) finishes; Titanium (suffix-T), White (suffix-W) or Brown (suffix-B). All BM blank modules are 3.94"w x 3.94"h (100mm x 100mm), and are made to snap into the MT series modular panel tri …