These are brand new, never used heat exchanges with internal titanium tubing, and external plastic tanks. Resist many corrosive fluids; like clor present in swimming pools. The item “3.8KW titanium heat exchanger for swimming pool heat pump, titanium condenser” is in sale since Monday, September 18, 2017. This item is in the category “Home & Garden\Yard, Garden & Outdoor Living\Pools & Spas\Pool Equipment & Parts\Pool Heaters & Solar Panels”. The seller is “imadtrade” and is located in Raleigh, North Carolina. This item can be shipped to United States.