The product includes accessories for external filters: water outlet kit with spray for CristalProfi and others with hose. Easy to use: connected the output kit to the external filter (not included). Square corner pipe: internal corner width 59 mm, adjustable sprayer, water flows over the corner and turns on oxygen. It has a reliable fastening thanks to the threaded connection of the brand.
Contents of the pack: water drain kit with two-part sprayer for external filters, available for brands 12/16, 16/22 and 19/27 mm. It is easy to install - just connect the pipe to the external filter and place the drained pipe in the aquarium.