6inch 3 Metre Pack PVC Flexible Ducting. Robust, lightweight ducting system ideal for ?through the wall applications or for connecting to a rigid duct Excellent flexibility for ease of installation in awkward situations Easily cut to length & fitting directly to fan & grille spigots Made of PVC & fire retardant to BS476 Parts 5, 6, 7 & 20 Available in 100mm (4?) & 150mm (6?) diameters & in 3, 10 or 45 metre lengths