Dual scale dial thermometers have easy-to-read temperature gauges. Stainless steel case, 3"" in diameter, with a heavy glass crystal window. Has external dial adjustment by Allen screw. Accuracy within ±1% of range over whole scale. 1/4"" diameter stainless steel stem with lengths as listed. Stem should be immersed at least 2"" in liquids and 4"" in gases for correct temperature measurements. Stainless steel connecting nut. 1/2"" NPT. Seasoned, accurately calibrated bi-metal element.