Outside filter accessory: wide-jet outlet cane for CristalProfi e and other outdoor hose filters. Easy installation: connect outlet kit to outdoor filter (not included), position in aquarium. Ideal water return: low CO2 loss due to wide-jet nozzle, convenient installation due to double elbow tube - corner distance: 59 mm. Secure attachment by means of screwed hose connection. Ideal for planted aquariums. Contents: water discharge kit with wide jet nozzle for external filter, available for 12/16, 16/22 and 19/27 pipes.