Machined from 7075/T6 aluminum – Mil-Spec hardcoat anodized finish – Stainless steel hardware – Fits picatinny and weaver style mounts and are NATO-STANAG compatible – Finish: Matte Black – Material: Aluminum – Height: Medium – Weight: 4.3 Ounce – Style: Picatinny – Tube Diameter: 35mm – Height (Base to Bottom of Tube): 0.4 Inches