Beautiful HARPA Shell Handcrafted Suction Cup Planter for aquariums, fish tanks, fish bowls, Betta rest No toxic glue used/no glue used. Approximately 3.5-4.5 inches long Shells are drilled through and suction cup to fit firmly and securely into the drilled hole. Suction Cup Attached PLANTS ARE NOT INCLUDED. Add a natural look to your aquarium, fish bowl or fish tank with this beautiful suction cup shell You can use live plants as pictured or use artificial plants. Simply place suction cup against aquarium glass/plastic, and lodge plant roots into the shell for a beautiful natural look.