CG | CG 5mm Hole Washer Gasket Thermocouple K J Type Hole Ring Head Temperature Sensor with 1/2/3/5M Wire for Temperature Controller

Specifications:  Type: K/ J Probe Style: Gasket type Hole Diameter of Gasket: 5mm Cable Length: 1/2/3/5M Temperature Range: 0~400°C  How to choose K type and J type looks same, just the material inside different, K type with bigger temperature range than J type . But the actual situation depends on your temperature display device. If the device is K, the sensor must be K, if the device is J, the sensor must be J.