The Fontus detergent nozzle is only compatible with the Fontus. The 450ml nozzle is compatible with
EasyAquatak 100LL/110/120, UniversalAquatak, AQT 33-10, AQT 33-11, AQT 35-12, AQT 37-13, AQT 42-13 and the 550ml Nozzle is compatible with EasyAquatak 100LL/110/120, UniversalAquatak, AdvancedAquatak, AQT 33-10, AQT 33-11, AQT 35-12, AQT 37-13, AQT 40-13, AQT 45-14 X.