The finest , most thermal conductive inserts available for the Dr. Dabber Switch! These are High grade pure aluminum nitride, CNC milled, and hand polished. They do NOT come with the metal cup, but you can use any of the stock cups included the white coated cup it comes with. These improve flavor SO MUCH over the stock insert. Enjoy low temp tasty dabs forever with this custom silicon carbide insert! There is a tiny gap on the side walls so any accidental spillage goes inside the metal cup and gets vaporized instead of ending up in the glass underneath. These work great and keep the Switch much cleaner!