This single-ended UV bulb fits many popular filters such as the following: All-in-Ones Hozelock EasyClear 7500 Oase Filtral 9000 PondXpert TripleAction 4500 Evolve PondXpert TripleAction 6000 Evolve Filters Hozelock Bioforce 8000 Oase Filtoclear 6000 Oase Filtoclear 11000 Oase Filtoclear 15000 Oase Filtomatic Intelligent 7000 PondXpert EasyFilter 12000 PondXpert SpinClean 4500 PondXpert SpinClean 6000 (Older Model) PondXpert SpinClean 12000 (Pre-2019 model) PondXpert SpinClean Auto 4500 PondXpert SpinClean Auto 5000 PondXpert SpinClean Auto 6000 UVCs Hozelock Vorton 11 PondXpert Greenstop 9000