
Philips Sonicare ProtectiveClean 5100
Sonic toothbrush

Philips Sonicare ProtectiveClean 5100
Sonic toothbrush
Which replacement brush fits Philips Sonicare ProtectiveClean 5100 - a W is shown on the brush head. I have already bought the wrong replacements, but unfortunately they don't fit. My handset has a round attachment with a side notch. I can only find replacement brush heads that fit the oval attachment, e.g. item 9699912. Can anyone help me?