ETS mags wont crack or break, are resistant to heat, cold, UV and harsh chemicals and wont become brittle over time. Their 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.Features :Fits the 10mm Glock 20, 29, 40Standard 15-round capacityEasy disassembly with their specially designed base plateErgonomically designed floor plate makes it easy to grab from mag pouchesLifetime Warranty