APEC Water Ultimate series FILTER-MAXQUICK is compatible with RO-QUICK90 All US made filters for maximum performance. Includes (1) sediment filter, (2) coconut shell carbon filters and (1) Dow Filmtec membrane Disposable filters to make filter change out SIMPLE, PAINLESS and SANITARY Premium 90 GPD membrane is individually lab tested to guarantee the highest rejection rate Guaranteed to remove up to 99% of all contaminants for the best drinking water quality possible