Aquario Neo Holder

The purpose is a part that mounts the inlet and outlet pipes of an external filter, and the product name is neo Holder. 

The aquarium fixing parts are fastened with bolts.
It is firmly fixed even if you turn it by hand with gloves on.
It is neatly mounted inside the aquarium without any parts such as bolts.

One product can be mounted up to 12 mm thick glass
It is fixed up to ~ 18 mm diameter inlet and outlet pipes.