The measured insulation voltage of a 0., 03MM thick cable is greater than 3000V. 🛩️ Size: Inner diameter x Thickness. Insulation Acid Resistant Polyimide Tube for Heating Element The measured tensile strength of the 0., 25MM inner diameter casing is 4N; the friction performance is excellent, with a friction coefficient of approximately 0., 5., 🛩️The insulation performance is excellent, with a dielectric constant of approximately 3., 4 and a dielectric strength of over 100KV. It can withstand temperatures up to 400 degrees Celsius for a short period. Seamless PI Tube Polyimide Casing PI Tube Capillary Tube High Temperature Resistant Insulating Sheath Tube High Temperature Capillary Tube 🛩️The product has excellent resistance to high and low temperatures, and can be used for a long time within the range of 200 to 300 degrees Celsius. Seamless PI Polyimide Tube Sleeve - High-Temperature Insulator 🛩️Package Include : 1PC (1 meter) 🛩️Polyimide is one of the organic polymer materials with the best comprehensive performance. 🛩️Chemically stable, resistant to various organic solvents and acids (except strong acids), resistant to boiling water and radiation, and with minimal volatiles at high vacuum conditions.