Baker Instruments T300 Series Stainless Steel Bi Metal Thermometer 50 to 550&deg;F (0 to 260&deg;C), 4" Stem, 1/2" NPT Straight Connection, 3" Dial All welded stainless steel construction Easy external recalibration adjustment 3" diameter dial, dual scale (F/C) Hermetically sealed, Accurate to 1 percent as per ASME B40.10 1/2" NPT straight connection