Standard 20 inch Jumbo (or Big ) Cartridge fits all 20 inch Jumbo / Big filter casings whether blue or white and are common medium to large whole house water purifiers. .
Usually used in conjunction with a Polyester spun sediment cartridge in a second casing to remove the fine sediment and dirt
20 x 4.5 inch cartridge ( 112 x 510 mm) to fit all brands of 20 inch Jumbo / Big casings