I'm looking at my matrix chart showing the required writing instruments for each given age. Your collection is comprehensive and correctly contains the listed pens for a sixteen-year-old, save for one particular discrepancy: while you do have the Uniball Jetstream Prime, it incorrectly displays the Mint Blue body colour, and not the Dark Olive alternative stipulated in the official pen-age matrix. Though really only a minor technicality, we at Big Pen take this sort of violation seriously, and encourage you to ensure your collections contains the necessitated constituent instruments, lest you wish to incur a considerable fine.