Sig Sauer Electro-Optics SOA10024 Alpha1 Hunting Rings Weaver 35mm 6061-T6 Aluminum High Black Matte Sig's Proprietary Aluminum Alloy Alpha Hunting Rings 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. Tube Diameter: 35mm Height: High Finish: Matte Material: 6061-T6 Aluminum Mount Type: Weaver