Yes, we have certificate for factory: ISO9001:2000, GMPC, FDA. Certificate for product: SGS, Intertek, MSDS, CFS, SASO, Health Certificate, REACH. If you need the special export certificate, we can help you to apply, but the application fee will on your account.
These masks are the same as the authorized health guidelines suggests.
Quality is good and buying in bulk seems the better option.