Stainless steel, hanging, wire, rat cages and single-sided cage racks made by Allentown Caging Co. Cages and racks are in Rocky Hill (near Princeton) NJ. Also some "metabolism cages" in stainless racks, for collecting urine. Some castors may need replacement. Some racks have useable or removable stainless watering system. Get quote for new cages and racks, then buy these for about half that price. Shipping negotiable depending on your location. Sale funds go to a non-profit organization. I would like to see these put to use, rather than sold for scrap metal.