S3 Cases are durable and customizable for use in the most extreme circumstances. When your equipment has to work when you need it, trust an S3 Case in the field.

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S3 Cases are made to be reliable and durable so that everyone relying on your equipment can rely on you. S3 Cases have many applications to protect your equipment when you need it most.

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S3 Cases are water-resistant, pressure-resistant and ready for any situation. When your expensive, delicate equipment needs protection, count on S3 Cases.

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Custom OEM Cases

S3 is a service-driven OEM case partner excelling in hard plastic cases for shipping, industrial, recreational and medical applications. We’ve done business with satisfied clients worldwide and we look forward to meeting any custom need you may have.


Give us a call and test us to see if we have a solution to your problem! Maybe you don’t even really know what you want, and just want to get a sense of what’s out there and what the options are. Let us help you brainstorm to come up with a great solution for your shipping and case needs.


Make your product stand out from the competition with an impressive custom-made case.

  • Custom colors, including translucent
  • Private labeling
  • Custom foam & foam case inserts
  • Mold modifications
  • Thermoplastic resin options
  • Panel mounts
  • Secondary operations (pad printing, machining, packaging, etc)


foam inserts

S3 offers a number of foam options to fully protect whatever is going in the case.

  • Open cell 1lb – 6lb polyurethane
  • Closed cell 2lb – 6lb polyethylene
  • Waterjet cut
  • Contour cut
  • Color options
  • Foam case insert

Why do companies prefer to work with S3 Cases for their custom OEM case needs?

S3 Cases has gained a reputation as one of the easiest companies to work with, consistently producing world-class custom-made cases with high quality custom foam inserts.


  • Excellent Customer Service – We work closely with our clients throughout the entire OEM case manufacturing process. From the moment you call our offices to the final delivery of your order, we’re at your beck and call, making the process as straightforward, open and communicative as possible.
  • Impeccable Custom Foam Case Insert Design – Having been in the business as long as we have we know to work with the top foam manufacturers. From the versatility of the foam, to the shape and size of the case, right down to our quick delivery and pricing, our cases are some of the best on the market. We also have the good sense to make sure we understand exactly what you want before we even get started. Find out more about our materials.
  • Dedicated Manufacturing & Quality Materials – S3 manufactures custom OEM cases right here in Colorado, where our headquarters are located. We use high quality ABS and polycarbonate for all our cases and manufacturing is done at a state-of-the-art molding facility. We focus on quality across large quantities of products and we make sure to wow you with quick turn-around time.


S3 cares about the environment and we do everything we can to lower our environmental impact. We use up to 25% plastic regrind to cut down on plastic scrap.


aalgo Download our foam spec sheet to find out more.


As leading U.S-based case manufacturers, our manufacturing capabilities are impressive. Put to your OEM cause, you’ll see how powerful our production line is.

  • 24 hour, 7 day/week molding
  • 18 molding machines, from 30 ton to 750 ton
  • ISO 90001.2000 certified
  • Secondary options: pad printing, machining, custom assembly and packaging


Are you interested in learning how our hard-sided custom cases can help your business? Contact us for a free sample. No matter how extreme your environment, S3 Cases has a protective case for your needs.