Tempered steel tube treated with a black, anti-friction coating ensures drop-free operation and smooth feeding in extreme duty environments. Enhanced spring, anti-tilt nylon follower feeds every type of bullet profile flawlessly. Witness holes in the rear side on both models provide visual round count. Caliber: 9mm Capacity: 18 rounds Compatible with all variants of the EDC X9, SFX9, SFT9, eXperior double stack models, and the AR-9X carbine Designed to meet the rigors of extreme duty and competition use Hardened carbon steel tubes with black friction coating Witness holes and red polymer follower for visual round count Removable polymer base pad for easy cleaning, mag numbering and fast reloads under stress Made in Italy by Mec-Gar the leaders in double column magazine design