This is a new in box Bi-Metal Tel-Tru thermometer.
Here is a link to the Tel-Tru web site with more technical Information. About this Thermometer.
http:// /cats/BT1100/BT1100.pdf
We are a Tel-Tru distributor. If you need multiple quanities of this item or any other Tel-Tru product we would be happy to help you.