The Penn-Plax Large Turtle Pier Aquarium Decoration provides your pet with a healthier, more natural environment while giving you a new way to interact with your aquatic pet. Sculpted in a traditional pier design, the turtle pier is great for turtles, frogs, newts and salamanders and is designed to give your pet a more natural aquatic environment while allowing you to use your entire tank for water. The deeper water eliminates most filtration restrictions, giving your pet a cleaner, more spacious area for swimming. Designed to fit most 20 gal. or larger tanks, the Penn-Plax pier has a platform base that is 16 in. long x 11 in. wide with a ramp extending 5 in. from the 16 in. side. The Turtle Pier's floating platform rests just above the water line on four 12 in. pilons that can be extended to 16 in. with the four 4 in. extensions (included) so your turtle can rest out of the water for basking while saving space in your tank. Each pilon has a suction cup so you can affix each securely to the bottom of your tank to prevent shifting. The floating platform allows for evaporation and will rise or fall with the water level up to 16 in. and can be set as low as 3 in. for low or no-water environments. A docking ramp provides your pet an easy climb to the upper level where they can bask and eat. Each platform has a bin for gravel (not included) that can be used to provide counterbalance for your large turtle when they climb the ramp.