•B type thermocouple for high heat applications at temperature up to 1700 oC. •Suitable for KSL-1700 and GSL-1600 series tube and muffle furnaces, like GSL-1600-60X, GSL-1600-80X, GSL-1700-60X, GSL-1700-80X,GSL-1700-100X and KSL-1600X-A2,KSL-1700X, and KSL-1700X-A1. •Ceramic end holder with screws to connect thermocouple to a temperature controller