Curaprox Interdental Brushes Prime Yellow CP09 are part of the Prime range that offers the thinnest of wire cores, for the easiest access to smaller interdental spaces, of all the brushes in the Curaprox product offering. 2.2mm, 2.5mm, 3.2mm, 4.0mm and 5.0mm effective cleaning. Curaprox Interdental Brushes Prime Yellow CP09 is effective removal of plaque and food debris from in-between the teeth, braces and bridges. The Prime range offers the thinnest of wire cores, for the easiest access to smaller interdental spaces, of all the brushes in the Curaprox product offering. 2. 2mm, 2. 5mm, 3. 2mm, 4. 0mm and 5. 0mm sizes available for effective cleaning CPS10 has a cleaning radius of 4. 0mm and an access radius of 0. 9mm Available in packs of 5The Prime range of interdental brushes are interchangeable with any of the Curaprox handles