Manufactered to factory OEM standards for a snug fit and reliable performance, the Promag® CZ® P10-C/P10-F 9MM 19-Round Blue Steel Magazine features a heat-treated steel body with a corrosion-resistant black oxide finish for lasting durability. Numbered witness holes deliver quick, visual round counts, while the removable floor plate makes for easy disassembly when maintenance and cleaning are required. Plus, a heat-treated chrome silicon wire internal spring eliminates binding, ensuring the injection-molded polymer follower operates flawlessly for reliable feeding. Made in USA.