COMPATIBLE WITH for IO SERIES ELECTRIC TOOTHBRUSHES: toothbrush caps are designed to keep your toothbrush hygienic when you are , camping, school, traveling, or the gym; all to protect your toothbrush from airborne dust, as well as for better hygiene and oral care; This product comes in of 6, perfect for sharing with your family and friends. COMPATIBLE WITH for ROUNDED REPLACEMENT HEADS: upgraded toothbrush cover cap not only compatible with for all io replacement heads but also compatible with for all rounded replacement heads. Example: Compatible with for io ultimate clean, io gentle care, action, , sensitive care, flossaction. etc round toothbrush heads. HEALTH AND SAFETY: electric toothbrush cover is made of food-grade safety material, and odorless. VENTILATION HOLE DESIGN: The design of 3 ventilation holes allows air to circulate so that your toothbrush stays dry. The structure design protects the cap from touching your bristles, keeping your toothbrush bristles straight and hygienic. size: 4 x 2cm Material: plastic colour: Blue Package Contents: 6 x toothbrush covers Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.