RO, QC, 4 STAGE, 50GPD. THIS WAS ACQUIRED FROM A CLOSED PLUMBING AND HEATING SHOP.I PERSONALLY KNOW VERY LITTLE IF ANYTHING ABOUT IT. AS I WENT THROUGH THE PIECES IT IS OBVIOUSLY BRAND NEW. HOWEVER, IT APPEARS AS THOUGH A VALVE OR 2 AND SOME OF THE MOUNTING HARDWARE IS MISSING??? YOU WILL RECEIVE THE UNIT EXACTLY AS PICTURED. PLEASE BE CERTAIN THAT YOU HAVE THE KNOWLEDGE AND THE ACCESS TO ADDITIONAL NEEDED HARDWARE TO COMPLETE THE INSTALLION. This item is in the category "Home & Garden\Kitchen, Dining & Bar\Small Kitchen Appliances\Water Purification\Water Filters". The seller is "woodmanwillie" and is located in this country: US. This item can be shipped to United States.