The MT modular frames are designed to be used with the Alpha Communications / S.T.R. modular series door entry stations and system annunciators. There are seven (7) configurations available in single and double-width varieties. TheMT frames are designed to be used in conjunction with the UPGseries (flush) or APG series (surface) housing(s). For larger configurations, multiple housings and MT frames may be mounted alongside each other. The MT trim frames are available in three (3) finishes; Titanium (suffix-T), White (suffix-W) or Brown (suffix-B). All MT series frames require the #13510 key / tool needed for installation and servicing of panel(s).