Koumeican the thinnest extension (power) cord in the world 0.0354-Inch Flat Code 9.84-Feet Black We have never seen it! Flat type (like a sheet) of an extension power cord of 0.9mm (about 0.003-Inch) thick. Resolve problems of previous cords which you have had, for example they are caught by something or bulky. You can make a safe and clean room by laying cords under carpets and mats, no bumps. This is 0.9mm (about 0.003-Inch) thick, so it gives you the electlicity through any gaps for example, the closet, out of windows, out of doors and places where you thought that it was impossible to have. Flat parts only come with a lifetime guarantee. (Free for repairs, but shipping cost (round trip) will be charged.) Conducted the test : passing the chair on casters with 90kg load on the code for 20,000 times. No breaking. Conducted the withstand load test : put 50mm diameter round bar on the flat part, apply 4 ton load. No breaking. It might be made wrinkles due to the temperature. You can straighten it by the hot air from a dryer.