Fire Rated Access Door Flush Mount Insulated Material 20 ga Galvanized Steel Door 16 ga Cold Rolled Steel Frame Access Door Installation Ceiling Upward-Swing Door Height 24 in Door Width 24 in Rough Opening Height 24 3/8 in Rough Opening Width 24 3/8 in Closure Type Hex Head Slam Latch Outside and Self-Latching Ring Operated Slam Latch Inside Hinge Type Piano Mounting Hole Size 8 Holes Diameter 1/4 in Finish White Powder Coated Primer