Fits full size 9mm 1911; 10 round capacity with numbered tube; Easy to load and seat with the slide in battery; Positive slide lock when empty; Superb feeding with a wide range of ammunition types; Steel follower for flawless slide lock-even with marginal pistols; The Stainless Steel ETM has the Strongest Magazine Tube Yet Developed, Virtually Eliminating Feed Lip Cracking, Tube Spread and Cracking and General Fatigue; Proprietary Multi-Step Tumbling and Finishing Process Provides Smooth Follower Operation and Insertion into the Weapon; Observation Slots Moved to the Rear of the Tube, Located Exactly Where They Need to be to Maintain the Structural Integrity; Removable Base Pad for Easy Maintenance and Versatility with Different Base Pad Options