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. They are widely used in of industry, agriculture, chemical and other automated temperature controlling. 2 fork terminals for easy connection. Temperature measurement range is from 800 celsius degree. Product Name : Thermocouple Transfer Type : K Number of Terminals : 2 Temperature : 800C Fork Terminal Spacing : 4.4mm/ 0.2" Probe Ring Size : 9 x 5mm/0.35" x 0.2"(Outside Dia.*Inner Dia.) External Shielding : Nylon Braided Cable Shield Total Length : 2M/ 6.6Ft Color : White Material:Nylon Braided Cable + Metal Weight : 19g Package Content : 1 x Thermocouple Note:Light 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 +/-1-3 cm.