"The item is manufactured from AL alloy A336T6, grade C, class 11 as specified in MIL-A-21180. It measures 16.750 inches in diameter and 3.00 inches wide. The object features a series of holes, with the largest being approximately 6.69 inches in diameter, while two other holes are each about 1.75 inches in diameter, and the smallest ones measure around 1.26 inches in diameter."