Aluminum alloy qq-a-250/1, type 1100, qq-a-250/2, type 3003, qq-a-255/6, type 2024, anodize mil-a-8625, 6.510in. O/a lg, 4.030 in. O/a w, 2.280 in.O/a h, operational voltage 18 to 30 v dc, load current 1 amp max at 26 v dc, dielectric strength 500 v rms - 60 hz for 1 minute