The overall length of both .9" rear shocks are the same, but the length of the mounting tab and cylinder vary greatly from one to the next. The 2 rear shocks in the picture below were built from new parts, the bodies came out of packs with the same old jrx-2 style header card from the same shop. There is considerable variation as seen in the pix, luckily the colors match well unlike the front ones which are different in color and tab length.
as an aside, has anyone gotten a NIP losi shock tower that wasnt all scratched up? Every one I've gotten so far with my projects has looked like it was tossed around a bit at the factory before putting it into the bag.

-Anthony