Harmsco Calypso Blue HB-20-035-W Cartridge 20" .035 Micron (4 pack)Application: 20 inch big blue cartridge . 035 microns Please note this item is sold in minimum quantities multiples of 4. Please also note that the price shown is per cartridge, not per case. Features include: Pleated design means more surface area and better holding capacity They can be washed and re used in most applications down to the 5 micron size Thermally bonded end caps ensure better sealing Each cartridge is individually shrink wrapped NSF

Scale reduction in kettles and coffee makers

Easy installation – easy maintenance – unlimited water at your fingertips

The 7SI water filter is the upgrade if you are looking for more capacity

Here is a link to learn more about warranty & returns

That's the same as 1/2 micron

QC7i Twin Series Head Spec Sheet

The 4FC-PS water filtration cartridge featuring exclusive Fibredyne™ media is designed to reduce PFOA/PFOS

chlorine byproducts

Media: carbon block

it provides up to 650 gal/day and includes a 50-gallon atmospheric tank

Warranty: five years

Here is a link to the replacement cartridge for this feeder