Copper covered polyester film dielectric 0.0048 in. Thk; test voltage at 1000 vdc; 2.062 in. Diameter plate with 0.116 in. Diameter mtg holes on 1.625 in. Diameter bolt circle; two 0.094 in. Diameter holes spaced 1.408 in. Center to center; 1.187 in. Inside dia; finish m351 per specification mil-f-14072 except thickness to 0.0001 to 0.0004 thk