size filter for Bulk Reef RODI?

Anyone bought replacement filters from aftermarket vendors for the Bulk Reef Supply RODI? I found the .6 Micron carbon block "Matrix" brand (same as my old filter) at a pretty good discount, but it is listed as 9 3/4". I think the kit lists filters as 10". Measuring the old filter it is 9 3/4" from top to bottom of the filter, but 10" including the rubber gaskets. I am thinking these filter press up on a nozzle so there is a little wiggle room anyway, bought thought I would check in here before dropping the $$$.