PE flexible air ducts are specifically produced for low and medium pressure heating, cooling, ventilation, exhaust and air conditioning systems. PE is highly resilient and can be used in applications with excessive vibration and/or perpetual motion systems. PE is extremely durable, strengthened with high tension steel spring wire, surrounded with thick glass wool or white polyester fiber insulation and a PE vapour barrier. PE is elastic and flexible. It can be easily fitted to circular, oval or rectangular connectors. Temperature range:from -15℃upto +120℃.