"The item is manufactured from 0.081 thick AL alloy, with a temper of O, conforming to specification QQ-A-250/11. After forming, the minimum wall thickness is 0.050. The alternate method of fabrication involves using AL alloy in temper T651, also conforming to specification QQ-A-250/11. The item measures 16.765 inches in diameter and 18.688 inches wide."