Curasept Proxi Prevention series interdental brushes in the P06 size, This is the ISO size 0 and has a 0.6mm core. Our smallest interdental brush for that tough space. Our Prevention series is recommended for narrow interdental spaces and where the gums are generally healthy. A packet of 5 brushes each one is premounted on its own handle. And each brush and handle combination has its own cap for cleanliness and maximum hygiene.