Check the listing for details. WATTS GTS550S SERIES 5-STAGE SEMI ANNUAL REPLACEMENT PACK. Condition: New. Listed at 39.99 USD. WHAT YOU WILL RECEIVE ONE (1) NEW, 5 MICRON 2.5"X10" SEDIMENT FILTER PRE FILTER PART # FPMB5-978 TWO (2) NEW, CARBON BLOCK 5 MICRON FILTER PART # F109009ONE (1) NEW, 10" INLINE 1/4" THREADED FPT FINAL FILTER PART # AICROFACTORY SEALEDTHESE ARE THE CORRECT REPLACEMENT FILTERS FOR YOUR WATTS GTS550S ROWATTS COMPATIBLE FILTERS OF SAME OR HIGHER QUALITY THAN OEMWE'VE SOLD THOUSANDS OF THESE FILTERS FOR WATTS RO'SGUARANTEED TO WORK IN YOUR WATTS ROREPLACE THESE FILTERS EVERY 6 MONTHS Get It Fast!! Get a Tracking Number!! For Only $35.00 More, Select USPS Priority Mail at Checkout and Receive Your Item in 2-3 Days and Get a Tracking Number and Up to $50 Insurance Protection.NOTE: USPS does not offer tracking numbers for First Class shipping.WARNING: Domestic USPS packages are not insured unless Priority Mail or Express shipping are purchased. Don’t pay more for less! We ship sooner, faster, and for less than our competitors. We ship immediately. We charge you less than our competitors charge you for slower service. We combine shipping upon request. We will match all verified competitor's prices. We ship internationally. Service makes the difference!