Buy online wholesale price set of 2 replacement filter cartridges for big blue whole house water filters systems, those replacement cartridges are designed to deliver safer, cleaner, water to every faucet and showerhead into the whole house without reducing down water pressure. By using oversized filter cartridges and housings this system maintains the strongest water pressure possible. In addition, these larger housings and filters require less frequent services, which saves you time, money, and effort. 1st Stage: 10 - 30 Micron Polypropylene Sediment Filter  2nd Stage: (CTO) Activated Carbon Block Filter Removes/Reduces: Sediment (silt, dirt, rust ETC.) Pesticides Bad tastes & odors Giardia Cysts Chlorine Turbidity Herbicides VOCs (volatile organic compounds) THMs (Trihalomethanes) MTBEs (Methyl tert-butyl ethers) * Pressure drop will be determined based on feed water pressure, filter cartridge selection and port sizes, fluid viscosity, filter life and conditions. Total 2 filtersr, each individually wrapped.