Introducing the all-new Black is White Hydrosonic Carbon Brush Head Duo Pack from Curaprox – the perfect solution for gentle whitening! With innovative technology, these carbon brush heads contain ultra-fine Curen® filaments that are coated with activated carbon particles – the only way to achieve a noticeably whiter smile without overstressing your teeth or causing sensitivity. And this duo pack contains two, so there’s always a spare ready when you need it. Get the sparkly, polished smile you've always wanted with ease and confidence - Black is White Hydrosonic Carbon Brush Heads provide a safe and thorough clean without having to worry about any harsh abrasive agents!