Leupold BackCountry cross slot weaver style rings feature an updated design which allows for more contact between the base and the ring for even greater stability. These rings are machined from aircraft grade 7075-T6 aluminum with an anodized matte black finish. The precision machining and quality finish will provide you with lightweight and rugged performance for a lifetime. Specifications and Features: Leupold BackCountry Scope Rings 175122 Cross Slot Weaver Style Ring 34mm Tube Diameter Medium Height Updated design for more surface contact Greater Stability Lightweight/Rugged Performance Precision Machined Made in the USA 7075-T6 Aircraft Grade Aluminum Hard Coat Anodized Finish Matte Black