1. Specification: - Type: Replacement Toothbrush Heads - Suitable For: Philips - Age: Adult - Material Composition: ABS Plastic + DuPont Bristles + 304 Stainless Steel 2. Comfortable, premium, and durable: Experience the difference of DuPont bristles. They care for teeth and gums, provide a deep cleaning, and can remove approximately 7 times more plaque than a manual toothbrush. 3. Independent Packaging & Hygienic Cover: Each toothbrush head is independently sealed - packed and comes with a dust - cover cap. It is hygienic. You can share it with your friends and travel with it. 4. Screw - on system fits: Advance, CleanCare, Elite, Essence, and Xtreme Brush Handles. As long as there is an e - series, it can be used. 5. Suitable for common Philips models: - HX5 series: HX5100/HX5251/HX5451/HX5581/HX5751 - HX7 series: HX7001/HX7351/HX7361/HX7551/HX7553 - HX9 series: HX9552/HX9553/HX9842/HX9882 - Other series: Advance e - 4000/Essence e - 5000/Elite e7000/e9000/Xtreme e3000/E and X series 6. Package Included: - 1Pc or 2Pcs or 4Pcs x Replacement Toothbrush Heads 7. Note: - Please allow about 1 - 3 cm measuring deviation due to manual measurement. (1 inch = 2.54 cm) - Due to the different monitor and light effect, the actual color of the item might be slightly different from the color shown in the pictures. Thank you.