Standard 20 inch Jumbo (or Big ) Cartridge fits all 20 inch Jumbo / Big filter casings whether blue or white and are common on medium to large whole house water purifiers. .
20 x 4.5 inch cartridge ( 112 x 510 mm) to fit all brands of 20 inch Jumbo / Big casings
Variable gradient density cartridge merging from 20 microns on the outside layers and filtering down to 1 micron near the core.
( If ordering with a pleated cartridge there is an option to combine this cartridge with the pleated in that page).