Vortex® Precision Riflescope Rings are kept in pairs throughout the manufacturing process ensuring perfection from one set to another. These rings are held to an extremely tight tolerance of .0005" and are serialized, vibratory tumbled, hand-bead blasted, and anodized with Type III hard coat. FEATURE TECH Rugged, Lightweight, Snag-Free Design. Horizontally split for easier mounting. Commonality between fasteners and components for one-tool mounting. 100% made in USA guaranteed for life. Certified USA 7075 T6 Billet Aluminum. Type 3 Low-Glare Matte Black Anodized. Robust, Grade 8 Fasteners. Picatinny rail compatible. Specifications Tube Size 30mm Ring Height .87 inches Center Scope Height 0.87" Weight 2.1 oz. per ring Cap Screw Torque 15-18 in-lbs. Base Screw Torque 45-50 in-lbs. Tube Size 30mm Ring Height .97 inches Center Scope Height 0.97" Weight 2.3 oz. per ring Cap Screw Torque 15-18 in-lbs. Base Screw Torque 45-50 in-lbs. Tube Size 30mm Ring Height .97 inches (Weaver) Center Scope Height 0.97" Weight 2.3 oz. per ring Cap Screw Torque 15-18 in-lbs. Base Screw Torque 45-50 in-lbs. Tube Size 30mm Ring Height 1.26 inches Center Scope Height 1.26" Weight 2.5 oz. per ring Cap Screw Torque 15-18 in-lbs. Base Screw Torque 45-50 in-lbs. Tube Size 30mm Ring Height 1.45 inches Center Scope Height 1.45" Weight 2.6 oz. per ring Cap Screw Torque 15-18 in-lbs. Base Screw Torque 45-50 in-lbs. Product Videos Manuals & Parts Vortex Precision Matched 30mm Rings .87 Inches Instruction Card Vortex Precision Matched 30mm Rings .97 Inches Instruction Card Vortex Precision Matched 30mm Rings .97 (Weaver) Inches Instruction Card Vortex Precision Matched 30mm Rings 1.26 Inches Instruction Card Vortex Precision Matched 30mm Rings 1.45 Inches Instruction Card