Do you want more uniform heating, better performance, and to eliminate the temperature limitations on your 3D printer? Then the Copperhead Hot Block is for you. Precision machined from a super conductive copper alloy, and plated in slippery, plastic resistant nickel, and entirely made in the US of A, the Copperhead Hot Block allows you to crank up the heat. It also includes built in wrench flats to allow for easy nozzle changes. Intended to be used with Boron Nitride thermal paste to install heater and temperature sensor. Compatible with thermistors, thermocouples and RTDs.