About this 3D model

Duct for RepRapPro extruder Wall thickness should be 0.6 through out, and you need to rotate the shroud STL so it lies flat the screw holes should be against the bed UPDATE added better v18 shroud and two new clips v2, this prints with 2 perimeters 30% infill, 3 layers top in bottom UPDATE added v19 chopped down v18 after glass plate clips obstruct fan shroud