This listing is for one each of the following products: 1. Dow Filmtec 50 GPD Thin Film Composite Dry Membrane:  This Standard Size Reverse Osmosis Membrane fits in a standard membrane housing.  The same standard membrane housing can accommodate RO membranes with capacities ranging between 18-100 gallons per day (GPD).2. AICRO Inline GAC Filter/RO Post Filter: AICRO-NSF is made Kemflo and used by many popular US companies as an original component in Reverse Osmosis Systems. This filter is often used as a Reverse Osmosis (RO) inline post filter. It clips on to the membrane housing and filters the water after the bladder tank, acting as a polishing filter.3. CA Ware 10" × 2½", 10 Micron Carbon Block Filter Cartridge: Class 1 Chlorine, Taste & Odor Reduction; 10 Micron Filtration; 5,000 Gallon Capacity @ 1 PPM Chlorine; Flow Rate: 1 GPM; Made with Premium Quality Coconut Shell Activated Carbon; Fits all Standard 10" Filter Housings, Reverse Osmosis Systems and Under Sink Systems4. 10" × 2½", 5 Micron Sediment Cartridge: 5 Micron Removal of Dirt, Rust & Sediment; Industry Standard Size 10" × 2.5" Sediment Cartridge Thank you for viewing. TW30-1812-50 AICRO-NSF CBC-10-10 LF-PP-005-249 dow, filmtec, tw30-1812-50, reverse osmosis, ro membrane, ro, thin film composite, dry membrane, drinking wateraicro, gac, granular activated carbon, inline filter, post filtercaware, ca ware, cbc-10, 10 micron, carbon block cartridge, carbon block filter, carbon filter5 micron, sediment cartridge, sediment filter, melt blown, spun polypropylene