Aquatic Life Reverse Osmosis (RO) 10" Replacement Filter Kit (Sediment, Carbon) For Kent Marine, Seachem, Spectrapure, and all RO or RO/DI units that use standard 10" cartridges. Kit Includes: (1) 1-Micron Pre-Filter Cartridge for Standard RO Systems, and (1) 5-Micron Carbon Block Pre-Filter Cartridge for Standard RO Systems. These replacement cartridges are interchangeable with Coralife, Kent Marine, Seachem, Spectrapure, and all other RO or RO/DI units that use standard 10" cartridges.