Anet A8 E3Dv6 Clone Cooling Fan Duct

grabcad

I use a fan duct to cool the hot end, employing the stock 40mm fan. The inner circle measures 22.5mm and fits my clone flawlessly; however, it may not match your clone. I've adopted this carriage from https://www.thingiverse.com/thing:2099577, as the linked one in its description was too tall and melted due to contact with the heat block.