I can only say. Total letdown. The brush is frayed after a week even with no strong proof and must be replaced after 10 days. An oral brush, I could use a month to six weeks until they had to be replaced.
These replicas are cheaper only at first glance. The original brushes you can use three to four times longer and then the bottom line is cheaper than the disposable junk.
So back ruefully to the "expensive" original busts swept back.
Too bad that it still has to be a star!