This is a new, unopened item, but it has been stored at home, so please consider before buying if you are particular about product condition. Will ship via Rakuraku Mercari便 or Yuuyu Mercari便. Due to irregular work, the shipping days are set longer. If you are in a hurry, please comment before purchasing. If I am off, I can ship it out early. Product Description By connecting to the intake pipe of external filters, powerheads, and hang-on-back filters from various manufacturers, including the Tetra Power Filter series, it further strengthens physical and biological filtration. Suitable for breeding as it prevents fry from being sucked in. Specially researched and developed by Tetra for power filters, this coarse-pored special sponge that is resistant to clogging achieves efficient filtration for a long period of time. The cleaning cycle of the filter media in the power filter body can be extended. With the included connection rubber and various pipes, it can be connected to various pipes (outer diameter 13-17mm).