The Z9 magazine is a 9 round magazine for the Glock 43. The Z9 is a steel magazine, and is the same length as the OEM Glock magazine with pinky extension, but holds an additional 3 rounds. Powercron is a cationic epoxy coating that offers excellent corrosion resistance and low VOC in a lead-free film electrocoat surface finish. If you are in a humid or salt water environment, or if you sweat a lot, we recommend Powercron, Electroless Nickel, or Black Electroless Nickel finish.