Check the listing for details. Universal GAC CTO 10"x2.5" filter cartridge for RO and water filters. Condition: New. Listed at 5.99 USD. Universal GAC CTO 10"x2.5" filter cartridge for Reverse Osmosis and water filters. OVERVIEW: Fit all 4, 5 and 6 stage Reverse Osmosis Systems, Whole House Filters and Simple Water Filters with Standard 10" housing and . - 10" x 2.5" CTO High Capacity Carbon Filter. Removes chlorine, chloramine, VOCs, bad taste and odor. Micron rating: 10 High quality guaranteed. Service life: 6-12 months or 2500 gallons 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: 20 days.