"MATL ALUMINUM ALLOY AL5050;HOLES ON PLATES IS .480 MIN TO .490 MAX;THE DISTANCE BETWEEN TWO HOLES FOR BRACE PUSHING KNEE IS 18.750;SIZE OF BRACE TUBE IS 15.75;THICKNESS OF PLATES ARE .250;PAINT AND TREATMENT OF BRACE,PUSHING KNEE IS ACCORDANCE WITH MIL-T-704,TYPE B"