Nightforce Ultralite Rings 34mm 1.0" Med 4 Screw Xtreme Duty A223 are lightweight and remarkably strong due to 7075-T6 hard anodized aluminum bodies and titanium beta crossbolts and jaws. Available in both four-screw and six-screw versions. Crafted of machined 7075-T6 hard anodized aluminum, with titanium crossbolts and jaws, they give you the performance of steel at half the weight. This unique construction provides strength well beyond that normally found in lightweight rings. Available Nightforce X-Treme Duty 34mm 4 Screw Ultralite RingsMPNCenterline HeightHeightA2231.0"MediumA2241.125"HighA2261.375"X-HighA2271.5"XX-High Nightforce Ultralite 1.00 Medium 34mm Ring Set A223