Caixa de subwoofer Ventilada voltada para o piso para um alto-falante redondo de 12 polegadas - 65 L / 27 Hz - 485 × 422 × 446 mm

Can you explain the height, width, and length of the port?

Can you please explain the height, width, and length of the port? I have changed the height of the port to different numbers but the 3d rendering does not show any changes. I don't understand. When I go to view the parts, none of the dimension change. What part of the port does height and width signify?