This is a remixed 40mm fan shroud with 8mm level sensor in the center. Shroud cavity enlarged to increase air volumn. keep it cool and to keep the hotend assembly compact.
USE 40x20mm FAN PLEASE.
Download full assembly from
original creator
Want a MGN12 direct drive motor mount? https://www.thingiverse.com/thing:3702217 MGN12 Titan Direct [top rider, rear belt]