RiflemanA(R) Rings are machined from aircraft-grade aluminum for incredible strength, and a lighter weight. Becoming extremely affordable, and exceptionally well -made essentials. 3/8" Height: 0.96" Matte Black, or gloss finish Forged and Machined steel construction Versatile, available for many different rifles Recommended Objective Size: 50mm Objectives will almost always use HIGH rings in a given style. In certain instances, such as with extremely heavy barrels or some makes of firearm, SUPER HIGH rings may be necessary