COMPATIBLE WITH IO SERIES ELECTRIC TOOTHBRUSHES: These toothbrush heads are designed to keep your toothbrush hygienic while you're on the go, camping, at school, traveling, or at the gym. Protect your toothbrush from airborne dust and maintain better hygiene and oral care. The product comes in a pack of 12, perfect for sharing with family and friends. COMPATIBLE WITH ROUND REPLACEMENT HEADS: The upgraded toothbrush cover is not only compatible with all io replacement heads but also with all round replacement heads. For example: Compatible with io Ultimate Clean, io Gentle Care, Action, Sensible Genc Care, Flossaction, etc. round toothbrush heads. HEALTH AND SAFETY: The electric toothbrush cover is made of food-grade material, without BPA and without . VENTILATION HOLES: The 3 ventilation holes allow air to circulate so your toothbrush stays dry. The unique structure prevents the lid from touching your bristles, keeping your toothbrush bristles straight and hygienic. Size: 4 x 2 cm Material: plastic Color: Multicolor Package Contents: 12 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 to be slightly different from the real thing. The measurement allowed error is +/- 1-3 cm.