文莱采购需求：型钢、碳钢管、A252管、管件

Could you please provide quotes for the following items? We are looking for insulation rolls of various sizes, diffuser cables, return air grills, duct tape, flexible ducts, a rooftop unit with detection, duct gaskets, and specific insulation sheets with foil. Additionally, we need galvanized steel duct insulation pins with adhesive. If you have any questions or need further clarification regarding the specifications, feel free to reach out. Looking forward to your prompt response!