Our proprietary steel alloy ALPHA2 Scope Mounts are machined with an exactness that is both strong yet ductile that allows our rings to form around a riflescope, yet will not damage scope under proper installation. The steel rings are epoxy powder coated to prevent oxidation and resist gun oils, cleaning solutions, and outdoor exposure. Misc 30mm Ring Type 1-Pc Base & Ring Combo Model Alpha2 Style 1 Piece Finish Black Pieces 1 Series Scope Mount/Ring Combo Material 6061-T6 Aluminum Mount Type 1913 Picatinny Rail Mount Height 1.53" Rings Included Yes