This is a grill for the charcoal filter side of a HEPA Filter system, suited to accomodate a 120mm fan with charcoal filter above.
This is a fan guard and charcoal filter housing for my IKEA Lack Enclosure, which houses my Geeetech A10.
Print outer side, down on the bed. No support needed. Slow down first layer, check line width to ensure the printer doesnt try to interpolate between lines and bounce around. during the hex pattern.