Designed to deliver superior durability and lasting performance the Wilson Combat® 1911 .45 ACP 8-Round Steel Magazine With Aluminum Base Pad features a corrosion-resistant, heat-treated, aircraft-grade stainless steel tube with precision-machined witness windows for quick, at-a-glance round counts. The high-tensile, heavy-duty spring offers long-lasting feeding performance and a positive slide stop operation for enhanced reliability, while the self-lubricating, fiber-filled nylon follower eliminates binding for smooth performance. Plus, the removable .350″ aluminum base pad makes for easy maintenance and cleaning.