View GLV International Ltd. on TEKEN44The AF-141 product page mentions the following standards and certifications: - **M1**: Class designation for the core and jacket materials, indicating a specific fire resistance classification. - **UL181**: Certification for Factory Made Air Ducts and Air Connectors, as per the Certificate of Compliance issued by UL. ([glv1995.com](https://glv1995.com/wp-content/uploads/2022/09/UL181.pdf?utm_source=openai)) Additionally, the product is described as an "Insulated Acoustic flexible duct with fiber barrier," which suggests compliance with relevant acoustic and insulation standards, though specific standard numbers are not provided on the page.
PSONOAIR; Material: Polyester/Aluminum; Working Temperature: -30°C to +125°C; Maximum Pressure: 3000 PA; Maximum Air Velocity: 30 m/s; Insulation Color: Red, Brown, Yellow, White.
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