Refilings - 2 pcs Oclean replacement brush heads per pack. Genuine Oclean toothbrush heads are compatible with Oclean rechargeable electric toothbrushes for kids. Suitable for all Oclean models. Genuine Oclean daily clean brush head features soft bristles designed for gentle brushing for improved oral health better than a manual toothbrush thanks to high-density tufting technology. Oclean Dupont Tynex bristles, and work together with the round shape brush head to ensure kid's comfortable and effective cleaning experience. One of the recommended toothbrush brush heads by Dental Professionals. Usually 2-3 months for a new head. Just snaps on the handle vertically for the convenient click-on brush heads.