Exhibit 1

JOINT FILING AGREEMENT

We, the signatories of the Amendment No. 2 to Schedule 13G to which this Agreement is attached, hereby agree that such statement is, and any amendments thereto filed by any of us will be, filed on behalf of each of us. This Agreement may be executed in two or more counterparts, each of which shall be deemed an original and all of which together shall constitute one instrument.

Date:  February 12, 2021

BCP GP LIMITED
By:	/s/ A.J. Silber
Name: A.J. Silber
Title: Director
BROOKFIELD ASSET MANAGEMENT INC.
By:	/s/ Jessica Diab
Name: Jessica Diab
Title: Officer
BROOKFIELD CAPITAL PARTNERS LTD.
By:	/s/ A.J. Silber
Name: A.J. Silber
Title: Officer
BPE IV (NON-CDN) GP LP, by its general partner, BROOKFIELD CAPITAL PARTNERS LTD.
By:	/s/ A.J. Silber
Name: A.J. Silber
Title: Officer
BCP IV GRAFTECH HOLDINGS LP, by its general partner, BPE IV (NON-CDN) GP LP, by its general partner, BROOKFIELD CAPITAL PARTNERS LTD.
By:	/s/ A.J. Silber
Name: A.J. Silber
Title: Officer
BROOKFIELD BUSINESS PARTNERS L.P., by its general partner, BROOKFIELD BUSINESS PARTNERS LIMITED
By:	/s/ James Bodi
Name: James Bodi
Title: Officer
BROOKFIELD PRIVATE EQUITY GROUP HOLDINGS LP, by its general partner, BROOKFIELD PRIVATE EQUITY INC.
By:	/s/ A.J. Silber
Name: A.J. Silber
Title: Director

BROOKFIELD PRIVATE EQUITY INC.
By:	/s/ A.J. Silber
Name: A.J. Silber
Title: Director
BROOKFIELD PRIVATE EQUITY HOLDINGS LLC
By:	/s/ Kristen Haase
Name: Kristen Haase
Title: Officer
BROOKFIELD US INC.
By:	/s/ Katayoon Sarpash
Name: Katayoon Sarpash
Title: Officer
BROOKFIELD PRIVATE FUNDS HOLDINGS INC.
By:	/s/ Katayoon Sarpash
Name: Katayoon Sarpash
Title: Officer
BROOKFIELD BBP CANADIAN GP L.P., by its general partner, BROOKFIELD CANGP LIMITED
By:	/s/ A.J. Silber
Name: A.J. Silber
Title: Officer
BROOKFIELD BUSINESS L.P., by its general partner, BROOKFIELD BUSINESS PARTNERS L.P., by its general partner, BROOKFIELD BUSINESS PARTNERS LIMITED
By:	/s/ James Bodi
Name: James Bodi
Title: Officer
BROOKFIELD BUSINESS PARTNERS LIMITED
By:	/s/ James Bodi
Name: James Bodi
Title: Officer
BCP IV (US PLAN) LP, by its general partner, BROOKFIELD PRIVATE EQUITY HOLDINGS LLC
By:	/s Kristen Haase
Name: Kristen Haase
Title: Officer

BCP IV (UK Plan) LP, by its general partner, BROOKFIELD CAPITAL PARTNERS LTD.
By:	/s/ A.J. Silber
Name: A.J. Silber
Title: Director
BCP IV (CDN PLAN) LP, by its general partner, BROOKFIELD CAPITAL PARTNERS LTD.
By:	/s/ A.J. Silber
Name: A.J. Silber
Title: Officer
BCP IV BERMUDA INVESTOR LP, by its general partner, BROOKFIELD CAPITAL PARTNERS LTD.
By:	/s/ A.J. Silber
Name: A.J. Silber
Title: Officer
BROOKFIELD BBP (CANADA) L.P., by its general partner, BROOKFIELD BBP CANADIAN GP L.P., by its general partner, BROOKFIELD CANGP LIMITED
By:	/s/ A.J. Silber
Name: A.J. Silber
Title: Officer
BROOKFIELD BBP CANADA HOLDINGS INC.
By:	/s/ A.J. Silber
Name: A.J. Silber
Title: Officer
BROOKFIELD CANGP LTD
By:	/s/ A.J. Silber
Name: A.J. Silber
Title: Officer