iSpring F4 Undersink Replacement Water Filters Set Under Sink Replacement Filter

What are included:one 5 micron sediment filter: with only five micron rating, it is effective in removing dirt, rust and sand particle. One granular activated carbon (GAC) filter: adsorb chlorine, halide, organic contaminants, odors, and other impurities that contribute to bad taste and odor. One 5 micron carbon block filter: remove any remaining chlorine and organic chemicals. Further enhance the taste of water. One post carbon inline filter: this carbon post filter removes objectionable tastes and odors to enhance the quality of your drinking water. Compatible to most RO systems, includes watts premier, Flowmatic, puroline, crystal quest, apec, and etc. All tested by independent third-party to meet NSF/ANSI Standard.