Available in 15 or 25 foot sizes for any model, our duct hoses are made of flexible, light duty vinyl woven polyester. Ducts are easily retractable and designed to handle large volumes of air at relatively low pressure. The ducts are flame-retardant and easily connect to fan lips for positive and/or negative airflow. Model 1225-SC duct is dipped in static conductive material for safe use in explosive-flammable environments with the VAF-3000P.