Material alum alloy a380 or 380 per qq-a-591 or 6061 t4 or t6 per qq-a-250/11 (sm1870-26 or -27); finish chromate chemical film per mil-c-5541, class 1a; surfaces painted per sd1037-05-44, black color no. 37038 per fed-std-595; dimensions in inches, 5.680 by 5.033
