Yescom 21 Pcs Reverse Osmosis Water Sediment Carbon Block Inline Replacment Filter 21pcs Replacement Filters for Standard Size Reverse Osmosis System 6 x Polypropylene Sediment Filters 6 x GAC Coconut Shell Carbon Filters 6 x CTO Coconut Shell Carbon Block Filters 3 x InlineT33 GAC Coconut Shell Carbon Filters (T33 GAC Coconut Shell Carbon Filter only fit for the filter with 2" Quick connect fittings)