"STEEL,CHROME-NICKEL-MOLYBDENUM,MIL-S-5000,E4340,CONDITION C,3.270IN. LG,2.870 IN. MIN,2.940 IN. MAX W,1.320 IN. H ON UPPER END,1.170 IN.H ON LOWER END,4 EXTENDED AREAS ON CORNERS FOR FASTENERS,0.450 IN. RADIUS,0.250 IN. DIA OF LOWER 2 MTG HOLES,0.313 IN. DIA OF UPPER 2 MTG HOLES"