Designed to fit your 1911 pattern firearms chambered in .45 ACP. Constructed of steel with an electroplate finish these magazines feature a high-tensile strength compression spring, polished follower, and precision-formed feed lips that provide a long reliable life. Individual witness holes allow you to monitor your ammunition status. Specifications Weight: 0.2lbs Compatibility: 1911 Caliber: .45 ACP Capacity: 8 Rounds Body Material: Steel Spring Material: Music Wire Finish: Cation Electrodeposition Coating