B3 Cassa Model Deep Black The B3 series is a professional-use model with improved heat resistance and durability thanks to a special mineral-containing coating and a thicker film. It's convenient not only for combing hair but also for comfortably stimulating stiff scalps and facial muscles. Massaging the scalp removes dirt from pores and increases hair volume. Furthermore, it can be used on the face for refreshing facial care. Recommended for: Those aiming for lustrous hair with a professional comb. For in-bath and out-of-bath hair and facial care.