> I have a reverse osmosis system that uses two filters. I have a label for one of the filters, and I am wondering whether you can tell me which other filter goes with it? I would like to order two set of filters. The label is for Pentek filtration EPM-10 Carbon Block Filter Cartridge. The system is labeled 'Reo-Pure' and there are two blue cases for filters. One is labeled 'Carbon pre-filter' and the other is labeled 'Sediment pre-filter.' Thanks.