Heat Resistant Combined flexible spiral duct for heating units is made to supply and exhaust hot air to/from confine spaces. Description -It is made of fire-resistant PVC Coated fabric, temperature range -20-150℃. -With the support of helix steel wire and black rubber strip, it is wear-and-tear proof. - End with straight sleeve. -Sewn with heating resisting wire. - First two meters of the duct is made of fire and hot resistant material, so that it can be connected to the heating units with high temperature. - Temperature range of the first two meter is -20-350℃. -It is characterized by its fire resistant, oleic acid proof. -Flexible and light weight for easy use and installation. Rolls up for easy transportation and storage. -Size: Standard diameter:100mm-1500mm, standard length: 5m,10m. Custom sizes are available upon request. Additional Information -OEM Service is available, we have the experienced R&D team. -Color: Yellow, black, orange, green, red… -Packing: Neutral carton packing. -Payment terms: 50% as deposit, the rest 50% should be paid off before shipment. -MOQ: 100 PCS. We also accept small test orders. Application Hot air exhaust and supply for forced air heater, smelting, boiler, heat equipment in high temperature environment. -High temperature boiler air exhaust and supply - Motor vehicle exhaust emission -Factory solder smoke