K-type Thermocouple wire for making high temperature thermocouple or extension wire Chromel / Alumel Type K thermocouple wire with Standard Accuracy: +/- 2.2C or +/-.75% High Temperature Kapton: 400 °C or 752°F, single strand wire, AWG 24 (0.51 mm) ANSI color coded high temperature Kapton plastic insulation, red = -, yellow = + Sold in 5 yd increments, 1 roll = 5 yard (15 ft), order 2 units and you get 2 rolls, each 5 yard This Type K thermocouple wire has a wide suable range, from -270 Cesius, -450 Fahrenheit to + 400 Celsius or +750 Fahrenheit