MOS is passionate about tackling your high-precision custom injection molding contract manufacturing challenges.
  • “I count on MOS for their outstanding customer service, commitment to quality, and willingness to search for and develop solutions to improve processes and reduce costs.”

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  • Engineering-Driven Quality

    We begin each project with an Engineering Design Review. MOS engineers will recommend design modifications to optimize cost and ensure manufacturability.

    Give us a call when you want it right the first time.

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  • They All Said It
    Couldn't be Done

    A San Francisco startup came to us with an idea to manufacture green toys out of post-consumer plastic. Every other plastics house had told them it couldn't be done. Fractionals, such as post-consumer plastics, are notoriously difficult to work with—a lot of molding companies won't even try it. We figured out how to make a near-impossible resin work for their product and also developed a way to color it with a poly-1 resin.

    Because they were a startup, funds were incredibly tight. We creatively used our global partnerships to hit their very modest tooling budget and deliver exactly what they wanted at a great price.

    —Abram McMillan
    MOS Project Engineer

  • Medical Device Manufacturing Capabilities & Certifications

Why MOS Plastics


Time to market is key for any new product. Every day of delay means dollars lost. Nowhere is that more true than in the medical and electronics industries.

Our team is passionate about tackling your custom injection molding  challenges and about devoting every resource to getting your product to market on time and in spec.

  • Concurrent engineering: One-on-one access to our design engineers to evolve your great idea into a cost-effective, manufacturable, functional device.
  • Consistent, traceable manufacture to specification: We specialize in precisely replicating your quality processes and tests in our ISO 13485:2003-certified facility.
  • A highly trained team empowered to act: Our team is right here, right now, ready to take care of you every step of the way.

MOS Customer Focus

As a custom plastic injection molding house, our job is to question the traditional way of doing things, be that in terms of design, tooling, molding, materials, process, or packaging. Many of our customers first came to MOS because they were confident that we could deliver quality end products no matter how unique their requirements.

Unique requirements aside, we bring our core values to every project:

  • Quick turn-around times: prototypes in as little as three weeks
  • MOS maintains a 99 percent on-time delivery rating
  • Accessibility: we're here when you need something done NOW
  • Tight-tolerance tooling: in-house as well as quality domestic and off-shore partners
  • Technical expertise in design, materials, tooling, molding, process

KS Automotive Kennerly-Spratling, Inc.