ETS offers some of the best Glock magazines on the market. Their transparent smoke polymer enables you to see your rounds making for a stunning visual. These magazines have been torture tested without fail. Fits the Glock 17, 18, 19, 26, and 34 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 loaded