M SERIES framesSteel door frames shall conform to the specification ofANSI A 250.8-2003/HMMA 861-06/SDI 100.M SERIES frames for 1-3/4” doors are formed from commercial quality cold rolled steel conforming to ASTM A1008/A 1008M-02, A653/A 653M-01 Galvanized or A666-00 Stainless Steel.Door frames , side lites, transom and borrowed lites are supplied ..