Hygienic Caps Included:Each Aoremon replacement brush head come with a hygienic cap, protecting it from dust for healthier storage and travel, If you don't satisfied with these replacement toothbrushes heads or you can't find the return way, you can contact us at any time, we will try our best to help. No Guessing for a Replacement: Aoremon replacement brush heads for Sonicare also have indicator bristles, So you just monitor the blue bristles will always know when to replace and always get an effective clean. Universal Compatibility - These refill brush heads are Compatible with Click-on Philips Sonicare toothbrush handles: ProtectiveClean 4100, 2 Series plaque control, 3 Series Gum Health, FlexCare, EasyClean. Use Aoremon Replacement for Philips Sonicare with No Worries - Aoremon toothbrush heads are manufactured independently in a facility which are made with the highest health and safety standard material, and each brush head is put through its paces to ensure durability and an exceptional performance every time you brush. Up to 10X Better plaque removal - Aoremon replacement brush heads for Philips Sonicare focus on personal oral health as goals. these replacement toothbrush heads made from densely-packed end-rounded Dupont bristles, and soft glue sides can slightly flex to let our brush head adapt to the shape of your teeth and gums, let you get up to 4x more surface contact, achieve removes up to 10x more plaque for an effortless deep clean.