Oral-B Sensitive Clean Ultra Thin Bristle Technology Replacement Heads, 2 Pcs As One Of Oral-B'S Top Replacement Brush Heads, Sensitive Clean Features Ultra-Fine Bristles That Are Gentle On Gums, Combined With Regular Bristles That Are Hard On Plaque. Sensitive Clean Removes Up To 100% More Plaque And Reduces Gingivitis By 100% Compared To A Manual Toothbrush. The Unique Combination Of Bristles With Rounded Edges And Very Fine Fibers Makes Sensitive Clean Ideal For Those With A Sensitive Oral Cavity And Those Simply Looking For An Excellent Yet Gentle Cleaning. Compatible With All Oral-B Handles Except Pulsonic & Io. Oral-B'S Best Choice For Gentle Cleaning And Healthier Gums (Excluding Oral-B Io). Up To 100% More Plaque Removal And Healthier Gums Than A Regular Manual Toothbrush. Combination Of Regular Fibers For Cleaner Teeth And Ultra-Fine Fibers For Healthier Gums. Dentists Recommend Changing The Brush Head Every 3 Months For Superior Cleaning. Compatible With All Oral-B Handles Except Pulsonic & Io. From The #1 Electric Toothbrush Brand Recommended By Dentists Worldwide. Number Of Toothbrush Heads Included In This Package: 2.