Adopting reputable DuPont Tynex Brilliance bristle, improved with German Pedex brush and Pedex fade-prompting brush, this Replacement Brush Head is specially designed for Oclean Z1 / X / SE / Air / One Automatic Sonic Toothbrush. With W-shaped design mini rounding head, the brush can get closer to clean the hard-to-reach interdental areas and remove the plaque and stains effectively. It would be better for you to replace the brush head when the blue bristle is changed to white color. Main Features ? Suitable for Oclean Z1 / X / SE / Air / One Automatic Sonic Toothbrush ? Adopt DuPont Tynex Brilliance bristle to provide better brushing experience ? W-shaped design, easy to clean the hard-to-reach interdental area ? Rounding bristle will not scratch your gums or damage the surface ? Rust-free, environmentally friendly and healthy ? Food-grade PP material with FDA certification for oral health care ? Food-grade pacifier TPE material, soft enough to clean the coated tongue ? Recommended to replace a brush head for 2 - 3 months by the dentists Brand: Oclean Model: P1 0.033 Package weight: 0.057 kg Product size (L x W x H): 1.38 x 1.38 x 8.35 cm / 0.54 x 0.54 x 3.29 inches Package size (L x W x H): 5.00 x 5.00 x 15.00 cm / 1.97 x 1.97 x 5.91 inches Package Contents: 1 x Toothbrush Head ( with Box )