These Talley Lightweight Alloy Scope Mounts are Black Anodized and fit 30mm. Using the strongest alloy, this mount is built to provide you with a solid platform to position your scope on. With quality equipment like this, sighting will not be difficult. Backed by the Talley name, this piece is designed to offer a very lightweight mount that is extremely strong and durable. This mount provides a stable base to position your scope and is strong enough to hold up even under the most extreme firing conditions. Pieces Set Mount Type Ringmount Tube Diameter 30mm Ring Height Low Finish Anodized Material Aluminum