Inserts - metal inserts are very common in rotational moulding and we have many customers’ own products featuring all manner of inserts as pictured below. The relatively large shrinkage of MDPE polyethylene ensures that inserts are tightly gripped during the moulding process. We do not have a design team or design facilities on-site so if assistance is required in developing a product design, we ask that potential customers contact a roto moulding designer who will be able to assist them in creating their product. We can recommend designers who have in-depth knowledge of the process and this is usually better than employing a designer with no plastic moulding experience because what looks great on paper may simply not be feasible when it comes to production. If in doubt, please do ask and we’ll be more than happy to help.