Here is an entire guidelines of well suited models:6150 6160 6201 6210 6211 6212 6220 6221 6231 6232 6240 6250 6251 6252 6253 6311 6320 6322 6330 6340 6411 6431 6510 6511 6512 6530 6552 6610 6631 6710 6711 6712 6720 6721 6722 6730 6732 6733 6750 6761 6780 6781 6782 6902 6903 6910 6911 6920 6921 6930 6932 6934 6950 6952 6970 6972 6973 6985 6992 8923 8911 8918 8920B 8931 9110 9111 9112 9120 9140 9141 9142 9150 9160 9171 9191 9311 9322 9330 9331 9332 9334 9336 9340 9342 9350 9351 9352 9360 9361 9362 9370 9371 9372 9381 9382 3100 3110 3120 3130 3210 3211 3214 3281 3631 3650 3631... If you are still uncertain whether or not those substitute heads suit your toothbrush, please be happy to Contact us directly. About this item*PROFESSIONAL CLEAN: The contour-shaped bristles suit you tooth and gum well, which may permanently eliminate meals debris and plaque between tooth and efficiently clear your teeth, providing you a snug brushing experience. *INDICATOR BRISTLES: Our alternative toothbrush heads are equipped with blue indicating bristles. Blue bristles for toothbrush substitute heads will fade in color indicating that you simply must exchange a toothbrush replacement, veritably three months. *WIDE COMPATIBILITY: Our electrical toothbrush substitute heads are suited to most Phil snap-on toothbrush handles, akin to 2 Series Plaque Control, 3 Series Gum Health, DailyClean, etc. other than 2421/ 2100 /242M /2023. Cautions:*Not well suited for children below 4 years old. Children below eight should solely use beneath the supervision of an adult.*All our products are brand new and sealed.