7aluminum alloy, qq-a-200/11, anodize and lacquer camouflage finish7.50 in. Lg, 4.00 in. Diameter large end, 3.223 in. Min, 3.226 in. Max diasmall end, 5 slots equally spaced on large end, 3.500-16 un-2b thdinside large end, 3.500-16 un-2a thd outside small end