The finishing touch for your rifle and optic combination, Pro Riflescope Rings combine rock-solid reliability and strength with high quality machining to ensure accuracy and consistency. Streamlined, lightweight, and durable, these rings use four Torx® T-25 style socket cap screws for secure mounting. Feature Tech Type 2 Low-Glare Matte Black Anodized Laser Engraved Torque Specifications Integrated Recoil Lug Picatinny and Weaver® Rail Compatible 6061 Aluminum Made in the USA Specifications Tube Size 30mm Ring Height Extra High (1.54 inches) Center Scope Height 1.54" (39.1mm) Weight 2.67 oz. (75.69g) Tube Size 30mm Ring Height High (1.26 inches) Center Scope Height 1.26 inches Weight 1.79 oz. per ring Tube Size 30mm Ring Height Medium (1.00 inches) Center Scope Height 1.00 inches (25.4 mm) 48.7 53.8 grams (1.72 oz) Parts Diagrams Pro Series 30mm Rings Extra High Mount (1.54 inches) Pro Series 30mm Rings High Mount (1.26 inches) Pro Series 30mm Rings Medium Mount (1.00 inches)