10" x 10" FD - 3 Hour Fire-Rated Insulated, Flush Access Panels for Ceilings Rough Opening Size=10 &frac38;" wide by 10 &frac38;" tall";" Material: 16 gauge steel frame, 2" thick 20 gauge steel insulated door, Finish: White powder coat primer Lock / latch: Universal turn ring and key tool Hinge: Continuous hinge Flange: 1" flange