The Fluke 80PK-18 Pipe Surface Thermocouple Kit includes the 80PK-8 Surface Thermocouple and the larger 80PK-10 Surface Thermocouple, giving you a full range of diameters to measure. Type K thermocouples clamp securely onto tubing, allowing for quick temperature measurements. The included padded carry case allows you to have both clamps handy in any situation.