Bristle type: Dupont 612 0.1mm /612 0.15mm. 1,Musical toothbrush head:According to the teeth cleaning tools designed to be a cup shape brush head,about 1 cm in diameter Classic design2.whenbrushing the brush just wrap in a hold tooth.3.Bristle type: Dupont 612 0.1mm /612 0.15mm.4.Common use toothbrush:ET-BE005-3X,ET-BE004,ET-RE001,ET-MT001,ET-ME002. Replacement brush head