"Material: Aluminum Alloy 2024 or 6061, Temper T4 or T6, specifications include QQ-A-225/6, QQ-A-225/8, QQ-A-200/3, or QQ-A-200/8. Coated with chromate per MIL-C-5541, Class 1A; dimensions: 1.660 inches in diameter by 1.750 inches overall. Includes five holes, each 0.165 inches in diameter."