Curaprox interdental brushes regular violet cps18 with the usual strong wire core and dense bristles they are especially suited to special care needs such as with orthodontic appliances under bridges and for users with limited dexterity curaprox interdental brushes come in the following sizes 22mm 25mm 32mm 50mm with flat head 50mm with tapered head 50mm with thicker wire core and 80mm cleaning radii the regular range of interdental brushes are interchangeable with any of the