Fluval Rubber Adaptor A20017 305/306/307, 405/406/407. Fluval Rubber Adaptor A20016 105/106/107, 205/206/207. Used to connect to output nozzle, aquastop and stem intake. Fluval Rubber Adapter. Fluval Rubber Adaptor A20228 FX4/FX5/FX6.
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