Includes (one) 3" diameter 20 feet long left spiral clear flexible hose Made from high quality PVC for durability, strength and easy installation Ultra flexible hose reinforced with spring steel wire delivers toughness and maneuverability Perfect for any clear view dust collection system ??? allowing you to monitor dust/ debris separation and vapor/ smoke filtration Ideal for an assortment of sawdust collectors, air conditioning indoor ventilation ducts and 3??? PVC dust collection systems for woodworking applications