“My current brush has a "W" on the bottom, not the "CS" that these have? Are they compatible with my current model of toothbrush?”

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• My guess is that the W is a whitening head, as opposed to a C cleaning head or G gum therapy head.

  Answered by CFLAJ 4 years ago

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• Hello! We recommend contacting Philips Sonicare directly at 800-682-7664 for more assistance.

  Answered by Philips Consumer Care 6 years ago

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