Hi Donald, Salt lake will send 52pcs samples according to the email requirements . And SMMP won’t do the test again , because we don't think it makes sense for MPD . Even though SMMP’s results are good , if MPD’s results are not good, we will suspect each other certainly to the respective spectrometer. It will be better to find a third party with certified so that we all trust the final test results . Thanks .Best Regards, Phoenix