The DuraChoice T3D25250 bi-metal thermometer has a 3" dial size, with a 2-1/2" stem. It features a stainless steel case with calibration dial, with 1/2" NPT connection. Measures 0 to 250 F (-20 to 120 C)

The DuraChoice T3D40250 bi-metal thermometer has a 3" dial size, with a 4" stem. It features a stainless steel case with calibration dial, with 1/2" NPT connection. Measures 0 to 250 F (-20 to 120 C)

The DuraChoice T3D60250 bi-metal thermometer has a 3" dial size, with a 6" stem. It features a stainless steel case with calibration dial, with 1/2" NPT connection. Measures 0 to 250 F (-20 to 120 C). The length of the thermometer stem includes the thread length of the connection.

The DuraChoice T3D90250 bi-metal thermometer has a 3" dial size, with a 9" stem. It features a stainless steel case with calibration dial, with 1/2" NPT connection. Measures 0 to 250 F (-20 to 120 C)

The DuraChoice T5D25250 bi-metal thermometer has a 5" dial size, with a 2-1/2" stem. It features a stainless steel case with calibration dial, with 1/2" NPT connection. Measures 0 to 250 F (-20 to 120 C)

The DuraChoice T5D60250 bi-metal thermometer has a 5" dial size, with a 6" stem. It features a stainless steel case with calibration dial, with 1/2" NPT connection. Measures 0 to 250 F (-20 to 120 C)

The DuraChoice T5D90250 bi-metal thermometer has a 5" dial size, with a 9" stem. It features a stainless steel case with calibration dial, with 1/2" NPT connection. Measures 0 to 250 F (-20 to 120 C)

The DuraChoice T5D40250 bi-metal thermometer has a 5" dial size, with a 4" stem. It features a stainless steel case with calibration dial, with 1/2" NPT connection. Measures 0 to 250 F (-20 to 120 C)