Size (InchShort): 0.056 in x 0.092 in. Outer Insulation: Fluorinated ethylene propylene (FEP). Material: Fluorinated ethylene propylene (FEP). Inner Insulation: Fluorinated ethylene propylene (FEP). Error Limit: ±2% reading from -330 to -165°F (-200 to -110°C); ±4°F (±2.2°C) from -165 to 545°F (-110 to 285°C); ±0.75% reading from 545 to 2300°F (285 to 1250°C).