This is the replacement reverse osmosis filter set for the Vertex PT-4.0/5 Reverse Osmosis Water System.

 Filter set includes:
(1) 5 Micron Sediment Cartridge Filter
(2) 10 Micron Carbon Block Cartridge Filter
(1) 10" Inline GAC Cartridge Filter (1/4" Female with 2-3/8" fittings and 2-1/4" Fittings)

Set should be changed once per year.  The replacement membrane is not included in the set, as it should only be replaced every 3 years