Round pipe ducting systems are the least resistant, due to the way the duct handles back-pressure. Ideal for fans, cooker hoods, whole-house ventilation systems and stack ventilation.- Rigid PVC ventilation duct- White Finish- 10mm (4- 2m long- Suitable for long duct runs where space is not an issue- Made from flame retardant materials- Round Pipe Lengths: Female- Accessories and Bends: Male- Maximum Operating Temperature: 60C- Material: uPVC