Reasons to Collaborate with Plastic Injection Moulding Companies? Aside from the obvious benefit of having a finished product at the end of a contract, there are numerous other advantages to working with the plastic manufacturing service provider here in the UK. Plastics manufacturers such as Rutland Plastics promise to provide services that make the clients' tasks easier while also making their customers happier. When businesses team up with a plastics specialist, they receive a competent business associate that can provide them with critical knowledge and guidance throughout the whole manufacturing process, whether it helps create the conceptual design to the post-production shipment.