Our heat sink for the Elecraft KX3 is designed to offer the user lengthened TX sessions 
with a drastically more efficient design.   The body is CNC machined from lightweight 
6061 aluminum, tumbled to remove all sharp edges and finished with a Mil Spec Type III 
hard coat anodized finish.   This finish is about .0015" thick so, it's thin enough to 
not inhibit heat transfer and dissipation and yet very durable to provide long lasting 
protection.   No new hardware is required as it uses the hardware from the factory heat 
sink.  Each KX3 Heat Sink comes with 1 packet of thermal transfer past and installation 
instructions. 
Designed and manufactured in the USA!