Hoyt has set the standards for accuracy, quality, and dependability in pressure and temperature measurement. The V064312b Temperature Gauge available in 52mm. type 5/8" - 18 UNF 100-280degrees F/40-120 degrees C. Liquid filled with hair bore capillary, well sheilded with stainless steel wire braiding and plastic sleeve for mechanical short -circuiting. Design assures linear indication and makes it rugged enough and capable of bearing accidental abuse, unlike vapor pressure gauges by others.