Check the listing for details. Water Filter / RO Replacement Set of 3 Pre-Filters: Sediment , GAC , CTO 10". Condition: New. Listed at 24.95 USD. Universal Replacement Set for Undersink Reverse Osmosis Water Purification Systems. OVERVIEW: Fit all 4, 5 and 6 stage Reverse Osmosis Systems or whole house filters. Fit regular 10" housing. Set of 3 pre-filters: - 10" Sediment Filter, 5 Micron. Removes dirt, silt, sand, rust and scale particles. - 10" GAC Granulated Activated Carbon Filter. Removes chlorine, chloramine, VOCs and etc. - 10" CTO Carbon Block Filter. Removes chlorine, chloramine, VOCs, bad taste and odor. 10 MicronHigh quality guaranteed. Service life: 6-12 months. We highly recommend to change pre-filters every 6 months. Discount! If you buy 2 sets of those filters it would cost $17.98 per first set , and only $14 for second set.You can find this set here:https://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=251514350715 If you want to order Reverse Osmosis membranes (just copy link and paste into browser): 50 GPD membrane: https://www.ebay.com/itm/50-GPD-Reverse-Osmosis-RO-TFC-membrane-made-in-USA-/251473164106?pt=LH_DefaultDomain_0&hash=item3a8cf7f74a 75 GPD: https://www.ebay.com/itm/261421410051?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649 100 GPD: https://www.ebay.com/itm/100-GPD-TFC-type-Reverse-Osmosis-RO-Membrane-made-in-USA-/251473165069?pt=LH_DefaultDomain_0&hash=item3a8cf7fb0d Shipping (Domestic and International): We ship within 1-2 business days via USPS Priority Mail. Returns/Exchange: Only of defected. Warranty: Warranty: 30 days.