6-inch x 35-inch 6-inch x 35-inch tank is commonly used on 0.5 cubic foot filtering systems, and 16K water softeners. 2.5-inch Opening 2.5-inch opening accepts most standard control heads, including Fleck, Autotrol, Clack, and most Culligan control heads Multiple Colors Available in almond, black, blue, and gray. Choose color in the "Options" tab above. Default color is almond and some color selections may not be immediately available and could delay shipping. 10 Year Warranty Tank has a 10 year manufacturer's warranty if it develops leaks through normal use.