The set includes:

1) Six pieces x Solid Prefilter 10" - 5 mic by Aqua filter (First stage / replacement every six months)

2) Six pieces x G.A.C. Activated Carbon Prefilter 10" by Aqua filter (Second stage / replacement every six months)

3) Six pieces x Antibacterial Activated Carbon Prefilter 10" by Aqua Pure Plus AP CLC 978 (Third stage / replacement every six months)

4) One piece x Reverse Osmosis Membrane 50 GPD - 190 liters/24 hours (Fourth stage / replacement every 3 years)

5) Three pieces x Activated Carbon Post-Processing Filter 2"x10" by Aqua filter (Fifth stage / replacement every twelve months)

Optionally, if your system includes it, you can add to the set:

6) Three pieces x Trace Element Enrichment Filter 2" x 10" (Sixth stage / replacement every twelve months)

7) Three pieces x Alkaline Ion Filter Aqua Filter in-line Aifir 20