Matl aluminum alloy per ams 4360; tin plate flash per ams 2408; body 9.430 in. Min and 9.436 in. Max id, 9.745 in. Min and 9.747 in. Max od; flange 8.912 in. Min and 8.932 in. Max id, externally 7 sided based on 10.99 in. Min and 11.01 in. Max dia, 7 holes 0.256 in. Min and 0.276 in. Max dia; 0.999 in. Long