Features: Picatinny scope riser Raises optics and mounts one half inch Mounts to any Picatinny rail Made from aircraft quality aluminum Hardcoat anodized to military specifications 5-1/4" in length Mfg: Yankee Hill Machine Co., Inc. Aluminum, Hardcoat anodized matte black. Length 5-1/4". Raises equipment 0.5".