Humphrey's Heat SinkATTENTION!!!! These will only fit the GEN 23 smokers as listed. Includes Free Shipping Humphrey's Heat Sink is here! You've all been asking for an accessory like this! Do you smoke dry? Do you run firebrick and are tired of wrapping them in foil to keep them clean? Do you run sand in your water pan to ask as a heat sink? Here's the solution for you! Humphrey's Heat Sink is filled with dual layers of firebrick and is welded together to keep grease off