Matl 0.020 in. Thk al aly sheet 6061 tem t6 per qq-a-250/11; finish sulfuric acid anodize per mil-a-8625 type ii cl 2 color no 37038 per fed-std-595 f-23, light diffusing polyester coating per f-190 0.0015 in. Thk; o/a dim 5.59 in. X 2.05 in. X 0.500 in.