You will get one finely sanded coconut cave with one or two holes. Please select options in the drop down menu. **Betta owners*** If you would like the second hole on the cave to be on the top for surface breathing, please select “BREATHING HOLE “option in the dropdown menu. (this option comes with a suction cup). The cave will vary due to this being a natural product however we will always send the best from our selection. The opening is 2". If you would like a smaller than average coconut, please state so in the comments section. If we have one smaller we will send one otherwise the coconut will be of average size. If you would like the suction cup positioned to the side of the coconut (main photo) verses the opposite end of the cave hole, please state so in the comment section, otherwise the suction cup will be positioned opposite the cave hole. (ie, cave hole in front , suction cup in back). All caves are sterilized at 300 degrees for a minimum of 20 minutes and are free of all pathogens. These caves look awesome in an aquarium and the fish love them. Excellent for cichlid fry, betta's, cory fish, shrimp or any other fish or invertebrates that love a cave. Please visit our shop for more aquarium accessories. https://www.etsy.com/shop/FreshwaterAquaticsNY