Huma Rd., Baoshan District Shanghai Shanghai 200431 China

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Suite 3002 1st Blg. Lane 1515 Zhangyang Rd. (International Mall), Shanghai, N/A, China

Shanghai You Zi Wan Import and Export Co. Ltd. is a professional industrial products manufacturer and service supplier with independent export and import right. We manufacture boron, silicon and tungs...

shanghai, shanghai, shanghai, China

We are a company specialized in developing and manufacturing intumescent seals with expandable graphite, mainly for fire dampers, fire doors, fire collars etc. And we also make specialized fire collar...