Set of 2, Premium Quality Replacement Filter Cartridges for BlueLife Water Purifiers/ Residential Water Puifiers. Sediment Filter Cartridge: 5 micron polypropylene sediment filter cartridge. Pre-Carbon Filter Cartridge: Silver impregnated granular activated carbon, 280 Grams Carbon Used. To be used with BlueLife TulipsPLUS and NanoPure models, also with other residential water purifiers subject to the suitable models.