Check the listing for details. 50 GPD Reverse Osmosis RO TFC membrane, made in USA. Condition: New. Listed at 21.90 USD. Universal TFC Type Reverse Osmosis Membrane, 50 GPD (Gallons Per Day). Membrane made in USA. OVERVIEW: Quantity of 1. Membrane made in USA. TYPICAL REJECTION CHARACTERISTICS OF R.O. MEMBRANES: Elements and the Percent Membranes will remove % of removal Arsenic 93%-96% Aluminum 86%-90% Bicarbonate 90% Cyanide 85%-93% Chloride 85%-92% Calcium 94%-98% Sodium 86.5%-93% Sulfate 96%-98% Potassium 84%-95% Barium 95%-98% Iron 94%-98% Nitrate 60%-76% Mercury 94%-98% Zink 95%-98% Selenium 94%-96% Lead 95%-98% Phosphate 94%-98% Magnesium 94%-98% Fluoride 82%-92% Nickel 96%-98% Cadmium 94%-98% Detergent 97%-98% Herbicides 97%-98% Insectecides 97%-98% Strontium 96% Need more? We offer wholesale lots: 50 GPD membranes (qty of 5, $18 ea): https://www.ebay.com/itm/Wholesale-5-of-50-GPD-TFC-Type-Reverse-Osmosis-RO-Membrane-made-in-USA-18-ea-/251666794854?ssPageName=ADME:L:LCA:US:1123 75 GPD membranes (qty of 5, $20 ea): https://www.ebay.com/itm/Wholesale-5-of-75-GPD-TFC-Type-Reverse-Osmosis-RO-Membrane-made-in-USA-20-ea-/261615279471?ssPageName=ADME:L:LCA:US:1123 100 GPD membranes (qty of 5, $23 ea): https://www.ebay.com/itm/Wholesale-5-of-100-GPD-TFC-Type-Reverse-Osmosis-RO-Membrane-made-in-USA-23-ea-/251666791794?ssPageName=ADME:L:LCA:US:1123 Shipping: We ship within 1-2 business days via USPS First Class Mail. Returns/Exchange: Within 15 days. Customer is responsible for shipping. Warranty: Warranty: 3 months.