These are made by KCI and a quality replacement magazine for a Glock. Glock magazines have a hardened steel insert which is encased in a high tech polymer (which is fully metal lined). The polymer coating protects the gun magazine and prevents deformation, even when dropped from great heights. Features: Constructed from steel and polymer just like factory Glock mags. Compaitable with Glock 9mm pistols: Glock 17, 18, 19, 26 & 34 models Construction: Polymer/Steel MFG: KCI Fits Glock 34, 17, 19 & 26 models Ultra-durable polymer with steel lining Viewing holes revealing how many rounds are left DISCLAIMER: GLOCK is a federally registered trademark of GLOCK, Inc. and is one of many trademarks owned by GLOCK, Inc. or GLOCK Ges.mbH. Neither Sportsmans Outdoor Superstore nor this site are affiliated in any manner with, or otherwise endorsed by, GLOCK, Inc. or GLOCK Ges.mbH. The use of GLOCK on this page is merely to advertise the sale of GLOCK pistols, parts, or components. For genuine GLOCK, Inc. and GLOCK Ges.mbH products and parts visit www.glock.com.