Effortless for Wide Compatibility: These NxtOut Replacement toothbrush heads are compatible with a wide range of Philips Sonicare Snap-On electric toothbrush models including 4100, 2100, 3100, 5100 & 6100 Series. Works with models like C1, C2, C3, W2, W3, G2, G3, 2 Series Plaque Control, 3 Series Gum Health, DiamondClean, ProtectiveClean, Flexcare+, HealthyWhite+, EasyClean, PowerUp, HydroClean & Sonicare Kids. They offer a secure fit and hassle-free replacement every time. Also Not compatible with Elite, E-Series, Essence, Screw-On, Advance or Xtreme handles. Deep Cleaning with Easy Snap-On Design: These Philips Sonicare replacement heads feature a secure snap-on design for quick changes. Made with soft, high-quality Dupont bristles, they gently clean teeth and gums while removing up to 8x more plaque than manual toothbrushes. The curved bristle shape reaches deep between teeth and along the gumline, helping to improve oral hygiene and keep your smile healthy and bright. Gentle & Effective Cleaning: Each Sonicare Replacement toothbrush head features soft Dupont bristles that provide a deep, yet gentle clean. Perfect for daily use and sensitive gums, each electric toothbrush heads ensures deep cleaning without irritation. These brush heads help maintain healthy teeth and strong oral hygiene with every brush. Value Pack of 8 Brush Heads, Long-Lasting & Gum-Friendly: Get 8 high-quality replacement heads for Sonicare 4100, C2 toothbrushes, designed to last and save you money on frequent replacements. Made with soft Dupont bristles, they clean deeply while being gentle on gums. Rounded tips prevent irritation, and the blue indicator bristles fade to show when it’s time to change, helping you maintain a healthy, effective brushing routine. Hygienic Travel Caps for Safe Storage – Perfect for Home & Travel Use: Each Sonicare 4100 replacement heads with a protective travel cap to keep bristles clean and safe from dust, dirt, and bacteria. Whether you're at home, storing extras, or packing for a trip, these hygienic covers make it easy to maintain cleanliness. Ideal for families and frequent travelers, this value pack of Sonicare-compatible brush heads is a smart, sanitary choice for your oral care routine. Maintain your daily dental care routine with NXT OUT Sonicare 4100 replacement heads compatible with a wide range of Philips Sonicare electric toothbrush handles. Designed with soft DuPont bristles, these brush heads provide a gentle yet thorough clean, making them suitable for users of all ages, including those with sensitive teeth. Each brush head features a secure snap-on design for easy attachment and removal, along with hygienic caps for safe storage or travel. The 8-pack ensures long-term use and great value, reducing the need for frequent reorders. Whether you're upgrading your current brush or stocking up for the family, these replacement heads are an easy choice for keeping your brushing routine on track — every day.