Flexible insulated 100mm (4″) ducting for use in cold roof spaces. This ducting retains the ambient temperature of the room, thus preventing steam condensing back into water and dripping back into a property. · · · 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. · · Helps to prevent structural damage · · Ideal for vertical installations · · 10mm (4″) diameter · · 10m long · · Material: PVC · · Fire retardant