Inquiry (采购产品): Exhaust rope seal MRB-750 We are a design engineering company and intend to use a product of yours. Part number MRB-750 for a European customer. They need more information than I currently have on hand. More specifically, I need your spec covering the fire rating of this rope seal. They are asking for the AO rating of this product. **** Hidden Message ***** Jeffrey Tom 45246 Company: Belcan Engineering E-mail: jtom@belcan.com **** Hidden Message ***** jtom@belcan.com