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4.5" CTO carbon block filter cartridge
4.5" CTO carbon block filter cartridge
Carbon block filters with larger OD, 10“x4.5", 20"x4.5" etc., suitable for standard big blue filter housings.

SF's 4.5" carbon blocks are like our 2.5" carbon blocks- made of high quality raw materials. Furthermore, with our experiences on sediment filters, we are making them with best seals, perfect dimensions and best pressure drop to meet different water conditions with edequate adsorbtion efficiency.
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