【Sanitary Packed】: Each replacement head equipped with dust cover then sealed into plastic bag and together packed in paper box. Three layers of protection avoid dust pollution during packing and transportation. 【Teeth Protection】: 95%-98% top of bristle rounded before packaging. Just considering protecting your teeth when brushing in high vibration. The teeth enamel would get worn if bristle was not rounded. 【Specially Designed】:This head is specially designed for compatible with Philips one by sonicare toothbrush, model HY1100/01/02/03/04 BD1001 BD1002 HY1200/01/02/03/04/05/06/25/26/27/28 BD3001 BD3002, Better matching and more thorough cleaning. It was made with the best quality material. High density, soft and end-rounded bristle with can perfectly protect the teeth. 【Teeth Protection】: 95%-98% top of bristle rounded before packaging. Just considering protecting teeth when brushing in high vibration. The teeth enamel would get worn if bristle was not rounded. 【High cost performance】: A box of 10 pieces can meet your need to change your toothbrush, and the price is more appropriate.