Polyamide, referred to as PA tube, nicknamed Nylon tube.It is a kind of synthetic fiber with good physical and chemical properties: wear resistance, can be used under the condition of sandstone and iron filings; smooth surface, reduce resistance, prevent rust and scale deposit; soft and easy Bending, easy to install and easy to machine.Nylon has many characteristics, so it is widely used in automobiles, electrical equipment, machinery, transportation equipment, textiles, paper machinery, etc.