Use new high-temperature probes to take the temperature in tight places. Bend probes around pipe diameters as small as twice the sheath diameter to easily determine your pipe temperature. Probes are tightly packed with powdered MgO in 12 or 25"L sheaths. Type J and type K probes feature INCONEL ® sheaths; type T probes feature 316 stainless steel sheaths. Probes include 3-ft stranded 24 gauge (0.020" dia) fiberglass wire with stainless steel over braid. Note: Type J exposed junction probes are not recommended for use with aqueous solutions.