Why Choose Membrane Solutions? Membrane Solutions is well-known membrane separation company with great experience and specialists in water purification. Our filtered products are widely used in residential, commercial and industrial water treatment. Membrane Solutions is committed to. Offering a special choice and add-value for our clients. Providing the most reliable filter products and highest service quality in the water treatment industry. Satisfying our customers with superior quality filtration products which provides you a much healthier lifestyle. Recognized Certification – Food Grade Material Meets TUV, ROHS, REACH, BPA FREE Certified. The filter reduces up to 99% of Chlorine, sand, rust, sediment, color, odor. This kind of filter is recommended for tap water filtration. Multi-Layer Density Tech – The whole house water filter is designed with density three PP layers and Coconut Shell Activated Carbon Layer to remove most contaminants and deliver great fresh water. The multi-layer density tech can capture impurities targetedly and have 30% longer service life than the other common type. High Capacity – The filter can filter up to 15000 gallons depending on water quality. Suggest to replace it every 3-6 months for the average household for optimal performance depending on the use. Let it bring a wonderful cleaner water experience to your loved ones. Compatible Models – The filter can be used in any standard 10″x 4.5″ heavy duty filter housings and compatible for standard 10 inch X 4.5 inch filter models of GE, Culligan, Dupont, Kenmore, Omnifilter, Whirlpool. Replacement for 10″ x 4.5″ filter housing like American Plumber, GXWH35F, WRC25HD, GXWH40L, GXWH30C, GXWH38F, GNQH38S and most systems with 10″ x 4.5″ filters, GE FXHTC, American Plumber WRC25HD, WHIRLPOOL WHKF-WHPCBB, Pentek RFC-BB and Culligan RFC-BB water filter. Compatible Replacement Filters – GE FXHTC, GXWH40L, American Plumber GXWH35F, GNWH38S, WHIRLPOOL WHKF-WHPCBB, WRC25HD, GXWH30C, GNQH38S, Pentek RFC-BB, Culligan RFC-BB, HD-950A, Whirlpool WHKF-GD25BB, RFC-BBSA, and most systems with 10″x4.5″ filters. Size: 10″ x 4.5″(Inside diameter 1.1 inches, outer diameter 4.52 inches, height 9.84 inches). Max Temperature: 104°F (40°C). Material: Premium Quality Coconut Shell Carbon. Lifetime: Replace the cartridge every 6 months or earlier—Depending on your water quality. Food Grade Efficiency Filtration. 1 Pack: 1x 10″x4.5″ CTO Carbon Block Water Filter. 2 Pack: 2x 10″x4.5″ CTO Carbon Block Water Filters. 4 Pack: 4x 10″x4.5″ CTO Carbon Block Water Filters. 6 Pack: 6x 10″x4.5″ CTO Carbon Block Water Filters. 8 Pack: 8x 10″x4.5″ CTO Carbon Block Water Filters. 9 Pack: 9x 10″x4.5″ CTO Carbon Block Water Filters. Not all of the filters are included in the package, please choose the Quantity you need in the selection.