Steel; phosphate coated; painted olive drab; 3.310 in. Min - 3.440 in. Max lg; 6.940 in. Min - 7.060 in. Max flange dia; 4.389 in. Min - 4.394 in. Max body od; 3.645 in. Min - 3.650 in.Max body id; 3 mounting holes in flange 0.526 in. Min - 0.541 in. Max dia