This toothbrush provides a CURAPROX brushing experience with a slightly firmer feel than our best selling CS5460, yet not as firm as our CS1560: With 3,960 CUREN® filaments this brush is still gentle on gums whilst also offering superb cleaning power. It is a perfect brush to move onto after the 1560. 3,960 CUREN® filaments, 0.12 mm in diameter.