
4.5 X 10 Inch Whole House Refillable Water Filter Cartridge with Kdf 85 and Acid-Washed Granular Carbon. 4.5 x 10 Inch Big Blue Size: Designed for compatible 4.5" x 10" whole house filter housings and big blue water filtration systems. Refillable Cartridge Design: Refillable structure allows filter media replacement and supports routine water filtration maintenance. KDF 85 And Granular Carbon: Filled with 300g KDF 85 and acid-washed granular carbon to support water treatment and filtration performance. Recommended Replacement Cycle: Recommended to change or refill the cartridge every 6-8 months for better filtration performance, depending on water quality and usage. OEM & ODM Customization: Filter media formula, cartridge size, shell color, label, barcode, packaging and carton mark can be customized for bulk orders.