Pretty sure it doesn't. I ordered it years ago for just that purpose and it didn't fit. The article now also says that it fits the models 'Check, Cubic, Double, Easy, Flash, Kyoto, Sahara, Stones, Sasso'. The thread diameter is approx. 14 mm, but for the PUR series it needs approx. 10 mm. I found matching replacement brushes from Spirella in the same look at Migros Do it.