14.5*14.5cm undergravel filter board Set for fishtank Square Bottom Board Divider Combined Sets Base Grid Bed for aquarium Aquarium Bottom filter plate Set bed filter board filter divider for fishes turtles "Anti gas air lift"

neverelse. Attention: The boards and the extended tubes can be combined and used together, and different combinations are suitable for different sizes of fish tank. 1. Safe materials, stable and durable. 2. Can be freely spliced or cut into certain shape as you need, easy to partner with any aquarium tank. 3. Several Boards can match each other work together as a big boards. You can order more Boards for better using. 4. Extended Tube to work with Air Tube and Air Stone(included to display the Anti gas air lift filter system. It is better filter efficiency. 1 Product Specifications: Material: Food grade plastic. Model: Filter Board, Filter Board(with nozzle), Extended tube. Color: Black, Clear. Model 1: Filter Board. Size: 14.5cm x 14.5cm x 2.5cm. Model 2: Filter Board(with nozzle). Size: 14.5cm x 14.5cm x 2.5cm. Tube Calibre: inner diameter 2.0cm or 2.2cm for nozzle. Model 3: Extended tube. Size: 31~51cm Length can be extendable or shortened. Tube Calibre: Inner diameter 1.8cm/Outer d