Detailed Product Description Industrial Bimetal Thermometers:Diameter: 2-1/2", 4"Case: stainless steel, steelBounden tube: brass Connection: brass or stainless steel Connection size: 1/4" 3/8" 1/2"NPT, BSP, BSPTPressure Range: 0-120-250-350-500 centidegreeAccuracy: 3-2-3%Customers brands and logos accepted.