The Underwater Galleries Large Cichlid Stone - Toehold Rock is one of our three large stones. Like all other Cichlid Stones it has only one opening so it can be used an a defensible space for one of  your cichlids; or cichlid couples. It has the widest opening of all the stones, great for those with larger fish.
 
*opening height: 2.5"
* widest point of opening on the diagonal: 3" 
* size - 7.5" long x 4.5" wide  x 4 " deep
* sold separately here or in our 8 and 10 Stone Kits.