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OASE BioMaster Prefilter foam set x4 (10ppi)

Suitable for the following filters

BioMaster Thermo/BioMaster2 Thermo 250, BioMaster Thermo/BioMaster2 Thermo 350, BioMaster Thermo/BioMaster2 Thermo 600, BioMaster Thermo/BioMaster2 Thermo 850, BioMaster/BioMaster2 250, BioMaster/BioMaster2 350, BioMaster/BioMaster2 600, BioMaster/BioMaster2 850