"MATL STEEL,SAE 1015,PAINTED MIL-T-704,TYPE A,12.000 IN. LG,10.000 IN. W,4 MOUNTING HOLES 0.281 IN. DIA,CORNERS 0.750 IN. RADIUS,4 HOLES 2.093 IN. DIA,4 HOLES 1.000 IN. DIA,8 HOLES 0.188 IN. DIA,4 HOLES 0.250 IN. DIA,2 HOLES 0.688 IN. DIA,1 HOLE 3.500 IN. X 2.156 IN. DIA"