This XPOWER 15-feet long ducting hose is a rugged PVC vinyl-coated polyester fabric hose with a black external PVC strip which resists exterior damage when dragging. This hose features a 16 inch. diameter and an integrated spring steel wire support coil which is flexible for expansion, compression and angled turns. Ideal option for heating, air conditioning, dehumidification, ventilation and exhaust jobs in a variety of industrial, residential, and construction applications. An optional ducting hose adapter kit (16DHK) is available to connect ducting to the XPOWER X-41ATR and X-47ATR axial fans.