This all in one box scaping assortment is an aquarists dream! Contains 2 x 12 " arches, 1 donut, 1 cave, 15 pounds of original style, one premium branch cluster, 3 ledges, and one jar of Rock Lock. Suitable for scaping a 50-80 gallon aquarium with plenty of real estate for coral placement and open swim area for fish. Create open and dimensional aquascapes all from one box!