- 12 Oral-B Pro CrossAction brush heads in black, in mailbox-friendly packaging - Removes up to 100% more plaque for cleaner teeth and healthier gums - X-shaped bristles set at 16º to clean hard-to-reach areas and adapt to each tooth - Usage indicator: bristles change from green to yellow to remind you to replace the head - Compatible with Oral-B rechargeable electric toothbrushes, except iO and Pulsonic models - No. 1 brand recommended by dentists, with clinically proven effectiveness - To install: remove the protective cap, place and twist the head until it locks - Replace every 3 months or when bristles are worn or bent - Do not use on sensitive areas; keep out of reach of young children to avoid choking - Read the description for information about possible allergies