- Original Oral-B Pro Cross Action Replacement Brush Heads, pack of 4 units - Over 2200 X-shaped bristles perfectly angled to remove up to 100% more plaque - 16° bristles that adapt to each tooth, providing deep cleaning and healthier gums - Usage indicator: bristles change from green to yellow to signal when it's time to replace - Compatible with all Oral-B rechargeable electric toothbrushes, except iO and Pulsonic - Advanced design reaches difficult areas where other brush heads can't - Recommended replacement every 3 months to maintain optimal oral hygiene - Easy to install: press and twist until you hear a click - Ideal for those seeking a professional dental cleaning at home