Feature a Adjustable Elevation Height: 35-41mm / 1.4-1.6in, Suited Different Objective Lens a Angle Value Can be Adjusted Smoothly, Accurately Compensate for Bullet Drop a Four Mounting Cross Bolts Per Ring, Ultra-strong & Stable, Fit Picatinny and Weaver Mount / 11mm Dovetail Mount with Anti-retreat Pin a Cantilever Mounting Solutions Give You Optimal Eye Relief and Rail Space a CNC Precision Machined from Rugged Aluminum Alloy, Stable and Durable Rings Specification Ring Dia: 30 mm Adjustable Elevation Height: 35-41 mm / 1.4 -1.6 in Material: 6061-T6 Aluminum Alloy Mount: Picatinny and Weaver / Dovetail Finish: Matte Black Items in the Package: 1 pc T15 Torx Wrench Video Size