HonGuan Flexible Aluminum Duct Fan Fittings two-sided wrapping Double Aluminum Foil Pipe for Greenhouse Hydroponic Exhaust Material: double-layer aluminum foil, spiral metallic wire, wrapping at both endsColor: silverDiameter: 75mm, 100mm, 150mmTemperature range: -30~150℃Maximum wind speed: 30m/sMaximum pressure: 2500PaLength range: 2mFire certificate: GB/T8624-2006 Made of double-layer aluminum foil, corrosion-resistant, comfortable surface, clean to scrub metal twine helix, hold shape, shrink freely, max length is 2mHigh toughness, could be freely bent to adapt to varied installation angles; good wear resistance, flame retardant, temperature range -30 ~ a hundred and fifty ℃ for prime pressure, medium strain and coffee stress air con packages and air flow systems, cooker exhaust, drying rooms, planting tents, etc.