Detailed Product Description Dial1.5"(40mm),2"(50mm),2.5"(63mm),4"(100mm),6"(150mm)CaseSt/st / Black painted steel/PlasticBulbBrass / st/stCapillaryCopper / st/stConnectionBottom / Back / Vari-angle3/4" or 1/2"NPT brass / st/st Accuracy±1.0% to ±3.0%Range -40-60 F & -40-15 C,-20-120 F & -30-50 C,