Spiralled Air Series Hoses (Flexible Ducting) from Continental (Contitech) were previously known as Merlett Spiralled Air Hoses.

They are a basic spiralled hose that consist of a plasticised PVC wall and a rigid spiral. The two molten materials are conveyed into an extrusion head, pushed through a die and the profile is wound around a mandrel to make the hose wall.

As well as the movement of chips, air and abrasive materials. some more specialist applications for specific Spiralled Air Hoses (Flexible Ducting) include the movement of fumes and gases, swimming pools filters and skimmers, movement of dry food, fish products plus use in environments where antisatic properties are a requirement.