pocket thermometer: All Stainless Steel 304 Material bimetal coil is from US; high accuracy; pocket thermometer:standard:ASME B40.200-2008,dial size:1",1-1/8",1-3/8",1-3/4",2",lens:glass,stem:3.6mm,3.8mm,5mm,6.35mm,stem length:1~12",temperature range:-80~600C,accuracy:+/-1.5-1-1.5%,waterproof:IP65,installation:back connection,thread:brass,SS316,SS304with the SS clip pocket thermometer