Fire Rated Access Panel Karp KRP-250 24" x 36" For Walls Rough Opening Size=24 &frac38;" wide x 36 &frac38;" high";" Material: 16 gauge cold rolled steel, Finish: Prime coat of rust inhibitive electrostatic powder, baked grey enamel Lock / latch: Spring loaded sliding bolt type keyed paddle latch, all keyed alike Hinge: Continuous piano hinge Flange: 1" flange