A thermocouple is a device consisting of two different conductors (usually metal alloys) that produce a voltage proportional to a temperature difference between either end of the pair of conductors. Grounded type is more sensitive to temperature, can help to measure temperature fastly. K type Thermocouple with flexible spring built in.2 terminals for easy connection. Temperature measurement range is from 0 celsius to 800 celsius degree. Widely used for industrial or laboratory to test equipments temperature. Product Name: Thermocouple Transfer Type: K Temperature Range: 0-800C Thread Diameter: 8mm / 3.1 inch Probe Diameter: 5mm/ 0.1 inch Fork Terminal Spacing: 4mm / 0.16 inch Probe Length: 100mm/ 4 inch External Shielding: Metal Shield Total Length: 2m / 6.5Ft Color: Silver Tone Material:Nylon Braided Cable + Metal Weight: 336g Package contents: 8 x Thermocouple 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.