Check the listing for details. AWG 24 K-Type Thermocouple Solid Wire Viny PVC Insulation 220 Yard Roll Spool. Condition: New. Listed at 449.00 USD. Standard K-type Thermocouple Wire with PVC insulation - 220 yard roll - This is a k-type thermocouple wire with yellow vinyl PVC insulation, which is good up to about 105 C or 221 F. This k-type thermocouple wire can be used to make your own thermocouples for a wide range of applications, or to make your own extension wire. When you use this double vinyl insulated thermocouple wire to build a K-type thermocouple extension it can transmit the temperature signal over the full K-type thermocouple range, from -300 to 2500 degree Fahrenheit. You just need to use the wire in a section that is below 221 F, so that the insulation does not melt. The chromel alumel wire is made to standard thermocouple specifications. This is a solid wire, it is AWG 24 or about 0.5 mm conductor thickness, therefore especially useful for k-type extension wires. It is sold in a 220 yard or about 660 ft roll. Specification K-type Thermocouple wire for making thermocouple or extension wireChromel / Alumel type K thermocouple wire with Standard Accuracy (whichever is greater): +/- 2.2C or +/- .75%Solid wire, AWG 24 (0.51 mm)ANSI color coded PVC insulation, red = -, yellow = +Sold in 220 yard (660 ft, 200 meter) spool