Blue Arrow 258 medium bristle, 30 bristles per box * 10 boxes = 300 bristles per box. Triple bristle design: The powerful and colorful bristles increase friction, deep clean, and the inner soft bristles care for the gums, improving multi-angle cleaning efficiency and preventing deformation. Wavy rounded brushing: The bristles are processed with wavy rounded brushing, more closely fitting the tooth surface, increasing cleaning power, and helping to remove tobacco stains, tea stains, and plaque. Massage tongue soft rubber: The soft rubber on the back of the brush head can scrape away tongue, keeping breath fresh, and making the mouth more hygienic.