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.