Hismile Electric Toothbrush Head Refills are designed for optimal dental hygiene. Compatible with Hismile electric toothbrushes, these refills ensure effective plaque removal and gum care. Electric toothbrush head refill Yellow color 1 pack Key Materials: Plastic head; Soft Nylon/PBT Bristles.Innovative oral care solutions for a brighter smile.Replace Brush Head Every 3 Months.Replace brush head every 3 months or sooner if bristles are frayed. Use only with Hismile electric toothbrush handle.