About this 3D model

It's a cover for the CraftBot 3d printer's fan, or any other 40mm fan. Printed by: https://www.indiegogo.com/projects/craftbot-3d-printer?sa=0&sp=0 http://craftunique.com/item/craftbot Sliced by: http://www.craftunique.com/craftware The layer height is 0.3mm.