With the Oral-B Pro-Flex Stain Eraser Manual Toothbrush you can discover a whiter smile and remove plaque. That s because its dual-flexing head design combined with a unique Stain Eraser work together to remove up to 90% of surface teeth stains and reveal a more dazzling white smile. Gentle on gums but tough on stains the Pro-Flex Stain Eraser toothbrush is the revolution you ve been hoping for in your manual toothbrush.