This is a factory Bersa Thunder 9 13-round magazine in 9mm. This magazine boasts a 13-round capacity, perfect for target practice and home defense. Constructed from robust blued steel, it offers exceptional durability and resistance to wear and tear. The stainless steel follower is anti-tilt, reducing the likelihood of jams. A high-quality, precision-wound steel spring wire maintains optimal tension, ensuring reliable cycling of 9mm rounds. The magazine is further enhanced by a polymer baseplate with a built-in finger rest, providing extra comfort and a better grip during use. Side-facing witness holes allow for quick and easy round count verification. This Bersa Thunder 9 magazine is an excellent blend of functionality, durability, and ergonomic design. Buy a couple today and keep your pistol running smoothly!