Accessory for external filters: water outlet pipe with wide jet pipe for external filter CristalProfi e and other filters with hose. Easy to use: connect the outlet set to the external filter (external filter not included). Place in the aquarium. Ideal water return: wide jet pipe means minimum loss of CO2, convenient to install thanks to square angle pipe – elbow: 59 mm. Threaded hose connection ensures reliable fastening. Suitable for planted aquariums. Contents: water return set with wide jet pipe for external filters, available for 12/16, 16/22 and 19/27 mm hoses. This set is compatible with JBL CristalProfi e1500/1 and e1500/2 filters, as well as other filters with 16/22 mm hoses.