Fits 1911 Compact 9mm; 9 round capacity with numbered tube; Easy to load and seat with the slide in battery; Positive slide lock when empty; .025" tube walls - thickest in the industry; Superb feeding with a wide range of ammunition types; Steel follower for flawless slide lock-even with marginal pistols; 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; Removable base pad for easy maintenance and versatility with different base pad options