Sorry 3.7 Inch. They look similar to 88 mm flak and I was a kid back then. I don't know how many launchers each battery would have but 4 batteries should be adequate to cover the following backed with pantsir. RWP/ISB/Kamra and everything imp in between Gujranwala/LHR/Sargodha Multan/Shorkot (if placed properly). KHI, Hyderabad e.t.c Yes, saw the poster here but was not sure. This wall shows that PA is serious.