K-type Thermocouple Extension Wire 6 ft long (= 2 yard, 182 cm) Chromel / Alumel K-Type thermocouple wire with Standard Accuracy, Wire diameter AWG 24 ( 0.51 mm ) ANSI Type K color coded PVC insulation, red = -, yellow = +, outside yellow Miniature K-type connectors, spade type, contacts made from Type K compensation metals chromel and alumel Cable Insulation: PVC, stable up to 221 degree Fahrenheit F or 105 degree Celsius C