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.