View GLV International Ltd. on TEKEN44The AF-128 product page mentions the following standards and certifications: - **M1**: Class designation indicating the material's fire resistance. - **UL181**: Standard for Factory Made Air Ducts and Air Connectors. - **EN 13180**: European standard for ventilation for buildings—ductwork—dimensions and mechanical requirements for flexible ducts. - **ISO 9001**: International standard for quality management systems. These references are found on the product page and the company's quality and certificates page. ([glv1995.com](https://glv1995.com/about-us/quality-and-certificates/?utm_source=openai))
Non-insulated flexible duct made of PVC, featuring an M1 reinforced construction and supported by a bronze-coated wire helix. Designed for temperatures between -30°C and +70°C, with a maximum pressure of 3000 PA and maximum air velocity of 30 m/s.
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