COMPATIBLE WITH PHILLIPS ONE ELECTRIC TOOTHBRUSH: only compatible with Phillips One by Sonicare. ONLY 6% PLASTIC CONTENT: ponpace biodegradable toothbrush replacement head is made of 100% bamboo body and plant-based bristles (composed of 62% castor oil and 38% nylon), with only 6% plastic content in the entire product. BE GENTLE ON ORAL CAVITY: ponpace bamboo replacement head is carefully polished with a food grade coating to make the entire brush head very smooth, combining extra soft end-rounded bristles, bring a better and safer experience to your oral cavity. WAVED BRISTLE：The advantage of a waved toothbrush head is that it can thoroughly clean the gaps between the teeth. RECYCLABLE PACKAGING & INDEPENDENT PACKAGING: Independent packaging ensures the safety and hygiene of each electric toothbrush replacement head, all packaging 100% plastic free. Our electric toothbrush heads use a new bio-based renewable bristle, the main component is castor oil. The use of plant-based castor oil bristles can reduce the dependence on fossil resources and reduce the use of fossil raw materials in the context of carbon neutralization. Body is made of 100% bamboo, no plastic inside. Compatible with Phillips One by Sonicare.