This listing is for 1 K-Type Thermocouple extension cable, with a miniature male and a miniature female k type thermocouple connector. They conform to the miniature connector dimensions with flat blades and the K-Type Thermocouple Extension Wire specification. This means the metal prongs and the wire are made from compensating metal, the same material as the k-type thermocouple wire, which is chromel / alumel. This means the impact of the extension wire on the temperature reading is minimized. Cable Insulation: PVC, stable up to 221 degree Fahrenheit F or 105 degree Celsius C. Connectors: High quality ABS plastic housing, stable to 248 degree Fahrenheit or 120 degree Celsius. This is also available in 3 ft, 6 ft, 9 ft or 12 ft. These are made to order in St Paul, MN, USA, from imported components.