A range of duct rodders are available. Such as those made from fiberglass, wheeled duct rodders and portable duct rodders. You can find a range of sizes for the duct rodders measured in millimeters as well.
The fiberglass duct rodders tend to have a smooth and elastic surface. The wheeled duct rodders have wheels that are on the frame. They make it easy to move around. The portable duct rodders feature carry handles, so you can pick them up and move them to where you need them quickly.