Printing with wood filament is a bit different than printing with other materials. The main difference is that wood filament is not as forgiving as other materials when it comes to nozzle size. A 0.4mm nozzle will work for some printers, but you may have to experiment a bit to find the right settings for your specific printer. If you can get the settings right, you can produce some beautiful prints with wood filament. Just be prepared to do a bit of trial and error before you get it perfect.