This is a popular replacement single-ended UV bulb that fits many pond filters and UV units including the following: Filters Blagdon Midipond 14000 Blagdon Midipond 28000 Fish Mate 30000 Hozelock Bioforce Revolution 9000 Laguna Pressure Flo 14000* Laguna Pressure Flo 28000* Oase Filtoclear 16000 PondXpert EasyFilter 30000 PondXpert SpinClean 20000 PondXpert SpinClean Auto 20000 UVCs Blagdon Pro * If your model was made pre-2015 you need an official Laguna 25w bulb, however a regular 24w bulb is sufficient for any models made 2015 onwards.