User rating, 4.7 out of 5 stars with 304 reviews.
This one has very hard bristles.
Answered by gr8sai 1 year ago
I think it is standard but that's my best guest.
Answered by notapol 1 year ago
Hello! Philips Sonicare C1 are medium.
Answered by Philips Consumer Care 1 year ago
Image of box says medium on bottom
Answered by Anonymous 1 year ago