Flexible Duct | 4" PVC Ducting | Exhaust Ducting 14' when extended / Collapsible to 18" Excellent for dust collection, ventilation and industrial applications. High Heat Resistance Temperatures Ranging From -20 to 185F. Ultra Thick Wear-Strip Handles The Toughest Applications and Extends the Life of the Ducting Crush, Kink, Bend and Deform Resistant