I am looking for helium gas grade of 5 based on 350pcs of 50L,200bar cylinder as per of ISO 9809

Add：No. 1106, 11th floor, Sarvesaei tower, Valiasr St. , , Tehran, Tehran, Iran (Islamic Republic of)
Contact Person: Mr. Salar Sabbagh
E-mail：salarsabbagh@gilsonite-bitumen.com
Telephone: 98-21-88552948
Fax: 98-21-88729845

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