"MATERIAL IS ALUMINUM ALLOY SHEETING,5052-H34,0.063 IN. NOMINAL STOCK THICKNNESS;ITEM INCLUDES DIFFUSER E5-19-9217-1;4 TABS E5-19-9217-2;HINGE MS35825-16A;OVERALL LENGTH 23.312 IN.;OVERALL WIDTH 19.560 IN.;5 HOLES,0.205 IN. DIA.;2 HOLES,0.187 IN. DIA.;4 HOLES,0.249 IN. DIA.;255 HOLES,0.125 IN. DIA."