This listing is for 4 filters C Series cartridges offer an economical solution for all of your general-purpose water filtration needs. Constructed of a carbon impregnated cellulose media, these dual-purpose cartridges filter out fine sediment particles and reduce unwanted taste, odor and chlorine taste and odor from your tap water.* A polyester reinforcement backing and external netting provide additional strength and dirt-loading capacity.C Series cartridges are available in three different sizes and two (2) different micron ratings. Both the C1 and C2 are nominally rated at 5-microns, the C8 is nominally rated at 1-micron.These dual-purpose cartridges are well suited for a wide range of residential applications, and make excellent polishing filters when used in process or closed-loop streams.* Based on manufacturer's internal testing.Features:Economically pricedProvides sediment filtration, bad taste & odor and chlorine taste & odor reduction*High dirt-holding capacityAvailable in three sizes and two micron ratingsRecommended for chlorinated water supplies