There are 2 Double Station, Titanium Tanks \n \nInside dimensions of each: 139″L x 38.50″ W x 48″H with 3″ Support Band around the tank. \n \nThere are 2 Single Station, Stainless Steel Tanks \n \nInside dimensions of each: 139″L x 20″W x 48″H with 2″ Supports Bands around the tanks. \n \n1″ Inlet/Outlet \n \nThere is 1 Double Station, Stainless Steel Tank \n \nInside dimensions: 139″L x 20″W x 48″H with 2″ Support Band \n \nTwo 2″ Inlets and Outlets.