Full-Size (Government Model); 8 Round Capacity; Aluminum .350" Base Pad, Black Finish; Increases Reliability in ALL 1911 Pistols; Aircraft Grade Certified Stainless Steel Tube Resists Corrosion; .027" Tube Walls - Thickest In The Industry; Tubes are Heat Treated for Maximum Durability and Service Life; Fiber-Fill Nylon Self-Lubricating Follower Provides Smooth Round Feeding; Maximum Tensile Strength Heavy-Duty Spring for Long Service Life, Enhanced Feeding and Positive Slide Stop Operation; Rugged black Melonite-QPQ finish for subdued, enhanced appearance and improved function. It is the most advanced magazine finish on the market and is guaranteed not to crack, peel or rust