AP810, AP801, Keystone CG10 Compatible Water Filter Multi-Pack, KleenWater KW810EC Replacement Cartridge, Dirt Rust Sediment Filtration, Set of 3, Includes O-ring 3M Cuno Aqua-Pure AP810 / AP801, Keystone CG10 compatible filters, set of 3 5 micron whole house water filter with dirt sediment and rust filtration Raised Groove polypropylene construction with 20 GPM flow rate Plastic end caps with gaskets ensure positive seal Replacement o-ring for 3M Aqua-Pure AP801 water filter