Underwater Galleries 6 Pc Aquarium Rock Kit is great for smaller fish tanks where smaller fish tank decor is needed.
Each Cichlid Stone comes with a single cave opening  to create a defensible space for aquarium fish. Each is modeled using real rocks found in nature, and recreated for you in a hollow ceramic cave form!
It is also great to try out the Underwater Galleries Cichlid Stone line an see how your fish like them before you get one of the bigger kits. 
The kit contains:
2- Small  Square Cichlid Stones   3.5" long
2-  Medium Toe-Hold Cichlid Stones - 5.5 " long
2- Medium Ravine Cichlid Stones- 5.75" long
 
 All made of sustainable, Eco-Friendly Ceramic.