?Specially Designed?:This head is specially designed for compatible with Philips one by sonicare toothbrush, model HY1100 HY1200 BH1022, 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. ?Easy to Install?: Easily snaps on for convenient replacement,Directly dial out and insert, and you can use it. ?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. ?"w" Shape Bristle?: Shape of bristle is designed in "W" shape thus the head can fit to your teeth well. A great shape for efficiently brush and removing more plaque and stains. ?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. Also, dust cover is perfect for travel, keeping your head free from germs & stains. Replacement Toothbrush Heads Compatible with Philips Sonicare One Toothbrush, for HY1100 Midnight Navy Blue BH1022/04 Brush Head (Midnight Navy Blue)