Hi,

Not always easy to tell from pictures. Is there are return lip on the bottom that's required on the finished part. If so I'm seeing a 5 piece mould. Top, bottom and 3 segments for the sides. The two undercuts (closest to the top and bottom) seem like natural split lines for the top and bottom pieces of the mould. Not a straight forward part to mould or produce, if your new to this I would be giving this one some careful thought. Although you say the center area of the top is not needed I would still incorporate this into the mould/ part and trim it afterwards.

Good luck Warren

Carbon Copies Ltd