Increases reliability in all 1911 pistols; Aircraft grade certified stainless steel tube resists corrosion; ETM has the strongest magazine tube yet developed, virtually eliminating feed lip cracking, tube spread and cracking and general fatigue; .025" tube walls - thickest in the industry; Refined radius for each bend in the tube to take advantage of the strength in the stainless steel; 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; Innovative follower design with its extended skirt ensures stability in operation and minimizes creep from the tube when the magazine is empty; Fiber-fill nylon self-lubricating follower provides smooth round feeding; Removable base pad for easy maintenance and versatility with different base pad options