PEEK tube is a super heat-resistant aromatic crystalline thermoplastics. PEEK tube can be used at very high tmperatures(about+260°C) and PEEK tube shows an extraordinary mechanical strength,thoughness,hardness,flexural strength, PEEK exhibits excellent chemical resistance, very good dielectric properties up to +260°C and a very good resistance to all kinds of radiation(even ultraviolet rays only lead to a slight yellow discolouration of its self-extinguishing properties according to UL 94.