Will be shipped with USPS. Original Hydrotech RO Reverse Osmosis Water Filters Carbon Sediment Cartridges Membrane Set You get 1 x Hydrotech® S-FS-02 Sediment Prefilter Cartridge Model # S-FS-02 | Part # 41400008 Replacement Sediment Cartridge for HT and HTF Series Reverse Osmosis Systems, Black End Caps. We ship original Hydrotech brand filters and membranes. Some other companies sell knock off filters not made by Hydrotech. You get 2 x Hydrotech® S-FS-19 Carbon Block Pre- and Post-Filter Cartridge Model # S-FS-19 | Part # 41400009 Replacement Carbon Block Pre- and Post-Filter Cartridge for HT and HTF Series Reverse Osmosis Systems, Blue End Caps. We ship original Hydrotech brand filters and membranes. Some other companies sell knock off filters not made by Hydrotech. You get 1 x Hydrotech® 33001033 TFC Dry Reverse Osmosis Membrane, 50 GPD Model # 33001033Replacement Membrane for HT and HTF Series, Yellow/White Band. If you are not sure which Hydrotech Membrane you need, look on the back of the dust cover for a silver sticker. Below the line of text, marked "Unit Description" the type and size of the membrane are indicated. The marking will start with either TFC or CTA for the membrane type, followed by the membrane capacity (9, 15, 25, 35 or 45), and then the letters GPD for gallons per day. Example: TFC 25 GPD or CTA 15 GPD.We ship original Hydrotech brand filters and membranes. These new dry membranes do not need to be refrigerated and have a long shelf life. Thank you for your visiting.