7100117 - PWROKC4 Replacement Filters for Kwik-Change Reverse Osmosis SystemWatts 7100117 PWROKC4 Replacement Filters for Kwik Change Reverse Osmosis System This Kwik Change four stage reverse osmosis annual replacement filter 4 pack includes one Kwik Change sediment red label filter, one Kwik Change carbon block yellow label filter, one Kwik Change 60 gallon per day reverse osmosis membrane and one Kwik Change granular activated carbon blue label filter. The sediment filter traps sediment and other particulate matter, such