For use with 100mm (4″) round ducting ventilaltion systems. This ducting is flexible and easy to connect to circular ducting. · · · Suitable for use with the range of 100mm fans · · Suitable for the extraction of hot and cold air. · · Suitable for the extraction of air from wet areas, such as bathrooms. · · Suitable for commercial and domestic use. · · 100mm (4″) diameter · · 10m long · · Material: PVC · · Fire retardant