Sig Sauer's aluminum alloy ALPHA6 Scope Rings are machined with an exactness that is both strong yet ductile that allows their rings to form around a riflescope, yet will not damage scope under proper installation. The aluminum rings are anodized for protection and durability, providing longevity against any elements. Specifications for SIG SAUER Alpha6 30mm Riflescope Ring Set: Manufacturer: SIG SAUER Finish: Anodized Base/Mount Type: Riflescope Ring Tube Diameter: 30 mm Gun Model: Universal Ring Quantity: Pair Quantity: 2 Ring Type: 2-Piece Base Fabric/Material: Stainless Steel Length: 0.64 Weight: 2.3 oz Color: Black Gun Rail: Picatinny Features of SIG SAUER Alpha6 30mm Riflescope Ring Set Fits Picatinny Package Contents: SIG SAUER Alpha6 30mm Riflescope Ring Set SIG SAUER Infinite Guarantee