This is a part cooling fan duct that replaces the stock anycubic i3 mega sheet metal fan duct when one swaps the stock J-head style hotend to an E3D V6 style hotend. note, this design is meant for orienting the e3D thermistor and heater cartridge harnessing toward the front of the machine with the LCD screen as shown in the attached image
Print requires no support but you may wan to print it fairly slowly given the small features that divide the duct holes.
I print this unit with 100 top layers which essentially fills the part out 100%, your mileage may vary.
This design does require you to add a dab of glue to full retain the shroud onto the fan.