Stone Warmer Thermometer. This thermometer has a 1" dial with 5" slim stem, a plastic pocket case, shock-proof protection, stainless steel parts, and unbreakable polycarbonate crystal. It has a Safe-T-SetTM external recalibration design with a 1 point calibration for ° 1% at dial midpoint. The temperature range is 0° to 220°F with 2-degree divisions. While this thermometer resembles some in grocery stores, this model is much more accurate.