The item is an aluminum alloy, conforming to QQ-A-225/9 temperature T651. Its overall dimensions are 1.91 inches in length, 1.32 inches in width, and 0.28 inches in thickness. A center hole has a diameter of 0.218 inches, while two holes at the ends have a diameter of 0.194 inches and are countersunk with an angle of 81 degrees.