Vortex Precision Matched 34mm Rings, .92 Low, Matte Black, Scope Rings Vortex Precision Matched Riflescope Rings are kept together as a matched pair through the whole manufacturing process, so each ring lines up with its partner. They are held to a tight tolerance of .0005, then serialized, vibratory tumbled, hand bead blasted and hard coat anodized. Tube size: 34mm Ring height: .92 (low), center scope height 0.92 Weight: 2.3 oz per ring Cap screw torque: 15-18 in-lbs; base screw torque: 45-50 in-lbs Material: USA 7075 T6 billet aluminum, Type III low glare matte black anodized Horizontally split for easier mounting; Grade 8 fasteners One tool mounting thanks to shared fasteners and components Picatinny rail compatible Made in the USA and covered by the Vortex VIP lifetime warranty