A:AnswerHello! We're not sure if understand your question correctly since both HX9043/24 and Philips Sonicare C3 Premium Plaque Control HX9044/65 are both brush heads. Hence, they're both compatible on all of our click-on toothbrushes.
A:AnswerHello! Yes, Philips Sonicare C3 brush head will fit Phillips Sonicare HX9100/B. All Philips click-on brush head will fit on any Philips click-on toothbrushes.
A:AnswerHello! Yes, Philips Sonicare Premium Plaque Control Brush Heads HX9044/95 are compatible with Philips Sonicare HX6850 and HX684B Electric Toothbrushes.
