These Philips Diamond Clean HX6064 brush heads are guaranteed to remove more plaque from hard-to-reach areas than a manual toothbrush. The diamond bristle heads have 44 percent more bristles than Philips Sonicares standard sized ProResults, providing you with both plaque removal and whiter teeth. Model number: HX6064/33. Pack of 4. These Philips Sonicare toothbrush heads feature a central stain-removal pad, made from densely packed diamond-shaped bristles, to remove surface stains caused by food and drinks. Compatible with DiamondClean handle, EasyClean handle, FlexCare handle, FlexCare Platinum handle, FlexCare+ handle, Sonicare for kids handle, HealthyWhite handle, 2 Series and 3 Series handles.