The file 'Tevo Flash Air Duct (volcano Heater Block) 3D Printer Model' is (stl) file type, size is 27.9KB.
This is designed to slightly compress air and head the flow efficiently.
I made this because I'm using the E3D copper heater block by Trianglelab with the stock heatsink (not the V6 hotend) :
https://www.aliexpress.com/store/product/trianglelab-High-Temperature-H59-copper-volcano-heater-block-for-E3D-HOTEND-Compatible-PT100-Thermistor-Cartridge-sensor/1654223_32918342986.html?spm=2114.12010612.8148356.12.39777bbeL1hJk3
