C2 Optimal Plaque Control Sonic Toothbrush Head Replacement Brush Heads Compatible with Philips Sonicare Protective Clean Electric Toothbrush,White,HX9023/65,Pack of 4 - Walmart.com
Amazon.com: Philips Sonicare Original C2 Optimal Plaque Defence (Formerly ProResults Plaque Control) - 4 Pack in White (Model HX9024/10) : Health & Household
Philips Sonicare Genuine Toothbrush Head Variety Pack, C3 Premium Plaque Control and C2 Optimal Plaque Control, 3 Brush Heads, White, HX9023/6 3 Count (Pack of 1)