A20001 Fluval Output Nozzle, 04 and 05 Series Replacement output nozzle for the Fluval 04/05 Series with non-kink tubing Fluval 04/05 Filters ensure maximum filtration Durable parts, easy to repair when necessary Hagen A20001 Fluval Output Nozzle suitable for use with Fluval Non-Kink Tubing, 04 and 05 Series.