AD-2000TK is a 0-2000F degree type K, thermocouple and is of the non-grounded case type required for use with the PY60-A EGT or CHT temp gauge. This particular unit is approximately 12" long. Currently ADI is attempting to secure a supply of varying cable lingths (type K thermocouples), as well as the appropriate lead extending cable to further aid in the accuracy of your installation, which can be altered by a junction made within the engine compartment... and/or with the wrong extending cable conductor material.