Why Choose Coex?  

Engineering Grade Materials


High Quality Resin = High Quality Filament

Our resins are sourced from US suppliers committed to high quality standards. Our partnerships with these suppliers ensures we maintain quality and consistent filament batch after batch. 

We only use prime virgin resins, colorants and processing additives to ensure reliability. Our base resins are often the same material that competitors call prime or plus.

Dry Filament

Our climate controlled factory ensures dry material throughout the filament making process. Once the filament is spooled, each roll is vacuum sealed with desiccant inside the bag to prevent moisture. More hygroscopic materials go through an additional drying process in both the raw resin and then again once spooled, before being vacuum sealed.This ensures you recieve dry filament ready for fine printing.


Quality Control

We quality control the entire process of our filament. Starting with an incoming inspection of resins.  We verify the resin is the high quality we expect.  Precise temperatures are monitored during the extrusion.  Laser measuring ensures our filament is held within a .03mm tolerance. A final inspection of color and quality ensures you receive our best product

Grades of Material

We believe in our filament so much, we often tell customers to start with our base filaments and compare them to the other makers higher grade filament. But we didn't stop with a great base grade, we also offer Prime in our PLA and ABS lineup. Prime is a more refined resin which improves print quality and strength.


We Are Your 3D Printing Experts

Performance. Partnership. Innovation. 

When you buy 3D printer filament from Coex, you can expect quality products manufactured to the highest standards. Whether you are an engineer developing 3D prototypes at a large company or an entrepreneur whose hobby is creating products at home, we’ll provide you the same level of excellent service and cutting-edge products. 

Coex is also a true partner, here to support your efforts and offer solutions. We are known for our agility and can quickly adapt to your needs.

We want to be your supplier

We will make your printing experience better.  We are more than just a supplier of 3D filament.  We are makers and creators, just like you.  Coex is a true partner, here to support your efforts and offer solutions.

When you choose Coex, you can expect:

  • An expert team with years of manufactuing and polymer engineering experience.
  • High tech extruding equipment intended for low and high volume runs of both standard and advanced polymers.
  • State-of-the-art laser measuring heads and pullers to ensure our products are always within specification.
  • In-line and post-production drying capabilities to ensure our 3D printer filament has no moisture.
  • Various spool sizes, ranging from 500g to 18lb and beyond.

Coex is More Than Your Average 3D Printing Supplier


Coex products are second to none and have an industry reputation for superior run reliability and overall quality. We use only prime virgin resins, colorants and processing additives to ensure the reliability of Coex 3D printer filamenet.


We offer many ways to be your 3D printer filament solution -- through contract manufacturing, private label programs, reselling, distribution. Because our equipment can produce short runs and high volumes of both standard and high performance polymers, we can offer a customized solution that fits your specific needs. Give us the opportunity to be your trusted partner!


We recognize that innovation never stops and we are continuously assessing new polymers and processes to improve the already unparalleled quality and reliability of our filament products. We are always experimenting and sharing tips to make your experiences exceptional.


We believe success is a great product delivered by great people. We pride ourselves on outstanding customer service. The knowledgeable staff at Coex is available to speak with you about your project, give you new ideas, and answer any questions you may have about 3D printer filament products.


Our order-to-ship time is significantly faster than industry standard, so you can always count on us for on-time delivery. Because our 3D filament products are produced in the USA at our Green Bay, Wisconsin, facility, they can be shipped to any domestic location quickly and affordably.


We have technical expertise on site. The Coex team has longevity in the industry — our average manufacturing employee has more than 10 years of experience. Because of this, you can be confident that you are not only getting a great product, but also the knowledge and expertise to address any questions you may have.

Coex 3D Brand Promise and Satisfaction Guarantee

Coex 3D is customer driven and always focused on producing the highest quality FDM filament available today.  Our customers can purchase our materials with confidence knowing that every spool is backed with our 100% Customer Satisfaction guarantee.  If you are not entirely satisfied with your filament purchase, we will give you a refund or replacement spool at no cost to you.

Why Are We So Confident?

  • At Coex 3D we are very particular about the raw materials used to produce each spool of filament.
  • Our suppliers and materials don’t change from batch to batch so we can always be confident in our raw resin and our colorants.
  • Our production machines are equipped with precisely calibrated gravimetric color feeders giving us confidence that our colors will be consistent.
  • Our inline filament measuring system guarantees that the diameter will remain within +/- .03 mm which will feed through your machines with ease.
  • Our packaging process ensures that your filament will arrive to you safely and be ready for use with no need to dry your filament prior to printing.

Note* Customers are expected to read the product information available for all Coex 3D products to make sure that your machines are capable of printing the materials purchased.