Thermocouple: K type Measuring temperature: -58F-2372F (-50C-1300C) Wire diameter: 3.2mm length: 215mm / 8.5 inch Insulation length: 162 mm / 6.3 inch Tube shape: 6 Pcs x 1 inch ceramic tube Insulator: double hole insulator connector can be connected directly to a digital thermometer. It can also be connected to a temperature controller by removing its connector. It can measure extremely high temperatures up to 2372F (1300) This heavy-duty 8 gauge is 8.5 inches long. The length of the thermocouple was measured by the number of ceramics 1 inch long. Added some extra length to the connection. You can adjust the length of this thermocouple by bending the probe/thread during installation. color: White Material: Nickel-chromium-nickel-silicon Package Contents: 3 x K type thermocouple sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.