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.Length: 7.33"Type: 1-Pc Base & Ring ComboModel: Alpha2Style: 1 PieceMisc: 30mm RingFinish: BlackMaterial: 6061-T6 AluminumPieces: 1Mount Type: 1913 Picatinny RailRings Included: YesMount Height: 1.53"