Check the listing for details. AWG 24 K-Type Thermocouple Solid Wire Vinyl PVC Insulation 330 Yard Roll Spool. Condition: New. Listed at 649.00 USD. Standard K-type Thermocouple Wire with PVC insulation - 330 yard roll - This is atype K 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. In factories it is used to wire up probes for machines, coolers or warehouses. 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 Type K wire in a section that is below 221 F, so that the insulation does not melt. The chromel alumel wire is made to standard Type K 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 330 yard or about 1000 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 330 yard (1000 ft, 300 meter) spool