When I recieved this I compaired it against my original authentic brush heads. After investigating online I'm 99% sure the product I recieved is a fake. The box & bristles are the wrong color, plastics are different & the clips inside are a different shape. I do worry that it won't clean as well or that is will damage my expensive clarisonic so I will be returning this. I wouldn't have minded so much if I knew I was purchasing a non-brand replacement brush.