Certificate of RegistrationThis certifies that the Quality Management System of

Bay Carbon, Inc. 800 Marquette

Bay City, Michigan, 48707, United States

has been assessed by NSF-ISR and found to be in conformance to the following standard(s):

ISO 9001:2015Scope of Registration:

The manufacture of high purity graphite parts for industry, including spectrographic electrodes, susceptors, fusion crucibles, discs, powders and rods.

Tom Chestnut,Sr Vice President - ISR, NSF-ISR, Ltd.

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Certificate Number: 4Y571-IS6Certificate Issue Date: 19-NOV-2019Registration Date: 19-NOV-2019Expiration Date *: 18-NOV-2022

This Annex is only Valid in connection with the above-mentioned certificate issued by NSF-ISR

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ANNEX PAGE FOR CERTIFICATE REGISTRATION NUMBER 4Y571-IS6

CERTIFICATE ISSUE DATE: 19-NOV-2019CERTIFICATE EXPIRATION DATE: 18-NOV-2022

Bay Carbon, Inc. 800 Marquette

Bay City, Michigan, 48707, United States

Remote Location: Bay Carbon Inc- C0269131

700 Marquette StreetBay City, Michigan, 48706, United States

Scope:Shipping and Packaging