Air duct for automotive speakers or residential box with 3 inches in diameter, 15 centimeters in length and used 2.5 mm in thickness.
widely used for the optimization of bass-type sounds.
The holes are for 5 small 3mm screws
The cut area for it to fit is the diameter of 9.10cm (Radius of 4.55)
I use 3D printers for hobby.
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License:
Creative Commons - Attribution - Non-Commercial - No Derivatives