Zeiss Ultralight 1913 Mil-Spec Picatinny-Style High Rings with Integral Bubble Level 7075 Aluminum Matte ZEISS Ultralight 1913 Mil-Spec Rings are manufactured to the highest of standards, from premium materials, and with tight tolerances for your long-term safety and field applications. They are designed for optimal long-range shooting solutions and allow for either right- or left-handed operations as well as eye dominance. The bubble level is easily viewed from the shooting position, creating no disturbance in your shooting position. A smarter, sleeker, and ultralight weight ring design for all heavy-duty hunting and shooting applications. Features: Recoil lug Bubble level Ultralight Durable 7075 aluminum Refined design