heat exchanger 3d model

3D heat exchanger model. Outer width 171 cm and inner width 159 cm. Inner height 30 cm and outer height 158 cm. The coil contains 18 horizontal tubes, each tube 16 mm diameter, arranged side‑by‑side with aluminum fins. A rectangular metal frame surrounds the coil according to the specified outer and inner dimensions. The unit has only one inlet and one outlet, with no additional pipes extending from the structure. Both nozzles are 2.5 inch diameter and each has a round flange with 8 evenly spaced bolts. The drawing must match the reference design provided, including all dimensions. Add a watermark with the name: Ma'moun Al-Zyoud. Clean technical engineering style suitable for mechanical explanation.