Spec Sheet Preview: The Alpha Communications® / TekTone model IH103 are mounting plates made of heavy gauge steel, in a galvanized finish. They are used with a variety of flush and surface mount intercom remote and/or master stations. The IH103 is designed to be a somewhat "universal" mounting plate to allow a variety of intercom stations to be mounted over existing IH101 flush back boxes, IH102 flush mountings rings or various electrical back boxes.