Material aluminum alloy permanentand semi-permanent mold casting 355 or356,temper t6,spec qq-a-596. Impregnate prior to anodize in accordance with type i,mil-i-13857. Finish 7.2.2 (dyed black) of mil-std-171. Blind holesto be free of anodize. On exterior cast surfaces finish 21.3 of mil-std-171 using primer tt-p-1757 color "y". Bakeprimer and top coat. Color white no. 27875 of fed-std-595. Overall length 10.604 in.