Fits all generations of Glock 17, 18, 19, 19X, 26, 34, and 45 Extended 40-round capacity Base plates interchangeable with ETS line of 9mm double stack magazines Due to the wide variety of extensions for Glock, the mag base is designed to be compatible with Glock extensions Easy disassembly with the specially designed base plate Ergonomically designed floor plate makes it easy to grab from mag pouches ETS mags won&';t crack or break, are resistant to heat, cold, UV and harsh chemicals - won&';t become brittle over time. ETS mags come with enhanced features like non-tilt followers, creep-resistant feed lips and clear body allowing you to see count and ammo type - leaving nothing to chance. Advanced Polymer Benefits: Extreme Impact Resistance - won&';t crack or break when dropped Very resistant to harsh chemicals Superior heat, cold and UV resistance - won&';t become brittle over time even when exposed to harsh environments or extreme cold Translucent body - allowing you to see your ammo count and type Creep resistant - the feed lips and body won&';t spread when being stored long term even when fully loadedtable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }