View GLV International Ltd. on TEKEN44The product page for AF-012 mentions the following standards and certifications: - **M1**: This classification indicates the fire performance of the duct material. - **UL181 CLASS 1**: This certification pertains to the fire safety standards for flexible air ducts. ([glv1995.com](https://glv1995.com/wp-content/uploads/products_certificates/AF012.Standards.Mark.311220.pdf?utm_source=openai)) Additionally, the product is constructed with Aluminum/PET laminate and is supported by a Bronze coated wire helix, featuring both inner and outer aluminum surfaces. ([glv1995.com](https://glv1995.com/product/af-012/?utm_source=openai))
Non-insulated flexible duct with an M1 4-layer construction, made of aluminum/PET laminate and supported by a bronze-coated wire helix. Operates within a temperature range of -30°C to +140°C, with a maximum pressure of 3000 PA and maximum air velocity of 30 m/s.
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