This U.S.A made magazine is constructed of a proprietary Dupont™ Zytel ® derived high impact polymer, with a steel insert for added rigidity to the feed lips. The spring is constructed of Chrome-silicon wire for added reliability. Will fit 9mm Glock models 17, 19, 26, and 34. All ProMag magazines include a lifetime warranty on manufactures defects.
This is a great inexpensive option for range mags and training mags that will hold up to abuse.