The 3M Cuno CFS017S-C20 fits the following water filter housings:
The 3M Cuno Retrofit 20" 5 Micron Chlorine Filter is a replacement water filter cartridge that arrives in a drop-in style and inclues granular activated carbon (GAC) media. This GAC water filter has a 5 micron rating and reduces the taste and odor of chlorine from your water, while also inhibiting scale build-up. This 5 micron filter measures 20 inches in length and improves your water quality and clarity. This Cuno water filter cartridge is compatible for retrofitting in 20 inch housings.
3M Cuno Retrofit 20" 5 Micron Chlorine Filter specifications: