ETS 40 round (9mm) mag, fits Glock 17,18,19,19X,26,34,45,49MAG FEATURES Fits all generations of Glock 17, 18, 19, 19x, 26, 34, 45 and 49 Extended 40 round capacity Base plates interchangeable with ETS line of 9mm double stack magazines Due to the wide variety of extensions for Glock, our mag base is designed to be compatible with Glock extensions Easy disassembly with our specially designed base plate Ergonomically designed floor plate makes it easy to grab from mag pouches Lifetime Warranty ADVANCED POLYMER