Heavy-duty, industrial thermometer featuring a weather-resistant, tamper-proof case Single °F, single °C, and dual scale options available Accuracy: ±1% full scale, Grade A, ASME B40.3 ± 1-34", 2", 3" and 5" sizes - center back connection only 304 stainless steel case and bezel Standard stem lengths 2-12" through 42" Highly sensitive bimetallic helix coil is heat-treated for stress relief, and silicone- coated to minimize pointer vibration and maximize heat transfer and response time 360° groove around stem is a visual reference to show mimum immersion point Made in the U.S.A. Note: Thermowells are recommended for pressure, corrosive fluids and high velocity applications.