This is a STAINLESS Metalform® Pro Series 8-round magazine with Xylan Coating, Ultra Mag Base & Round Follower for 1911 pistols in .45 ACP.
Metalform Pro magazines are the best of the best, combining durable stainless construction with a special corrosion-resistant Xylan® coating and Wolff® internal springs for maximum performance and reliability. Over the last 50 years, Metalform has earned a reputation for producing some of the most reliable 1911 magazines in the world. Trusted by everyone from top manufacturers to elite members of the military and law enforcement, Metalform magazines offer a wider variety of features and configurations you won’t find anywhere else. Metalform Pro magazines are ideal for duty and concealed carry use, but they excel in shooting sports and other practical uses as well.