Taylor Instruments #3621 BiTherm Thermometer Exclusive Safe-T-GuardTM antibacterial pocket case. Patented Safe-T-SetTM with built-in wrench pocket. Shock protectant/accelerant internal gel. Stainless steel internal construction. Shatter proof lens. Temperature range 0° - 220°F. Standard Grade. 1 point calibration. ** FEATURES ** 0/220 degF standard grade 1 point calibration w/antibacterial case 5" stems Recalibratetable Patented recalibration wrench built into pocket tube Shatterproof plastic lens High velocity dial graphics Convenient, protective case Durable, stainless steel Superior shock protection