11.720 in. Long; 3.280 in. Wide; 4.100 in. Between 2 holes along length; 6 holes 0.166 in. Dia; 2 holes 0.188 in. Dia; 0.060 in. Raduys 2 places; 0.040 in. Thk; aluminum alloy qq-a-250/11 6061-t6; chemical film mil-c-5541 class 3; epoxy mil-c-22750 class 1 type 3 color no. 37038 fed-std-595