The 13-round magazine for the Hellcat features stainless steel construction for durability, numbered round count witness holes and a black polymer follower. The magazine's black polymer extension gives you extra gripping area and has a pattern that matches the Adaptive Grip Texture of the Hellcat's polymer frame. Product Specifications Manufacturer: Springfield Armory Model: Hellcat Caliber: 9mm Luger Capacity: 13 Rounds Finish: Stainless Steel