Grayline LLC

2101 Airport Road
Waukesha, WI 53188


Grayline has been manufacturing flexible polymer tubing since 1966! Our roots are in the wiring harness and electrical tubing markets, but over the years we have expanded our product offerings to include fluid transfer products such as chemical resistant tubing, food & beverage tubing, medical tubing, fuel & oil resistant tubing, and pneumatic & hydraulic tubing. We also find that our flexible tubing products, both heat shrinkable and non-heat shrinkable, are used in a wide range of other applications to bundle objects together... protect items from abrasion or from the environment... thermally insulate a component... improve the appearance of an article... or color-code, identify or mark something. Grayline offers over 100 different types of tubing products, in a wide range of sizes and colors. Many Grayline products are engineered to meet various industry standards including UL/CSA, ASTM, AMS, Automotive, Military, EU Directives, USP, NSF and FDA. As a manufacturer, our Engineering staff can work directly with you to develop custom products that are optimized for your exact application. Color matching, specially formulated materials, individualized diameters and wall thicknesses, cut to length parts, in-line printing, hot stamping, heat forming and our many other custom services are all benefits of buying from Grayline. Grayline has customers located throughout North America and in Asia and Europe as well. Price, Quality and Delivery - those are the foundations of any top supplier. Grayline is proud of our short lead times and 99.9% on time shipping record. Grayline's excellent product quality is demonstrated by our customer concern rate of less than one-half of a percent - less than one in 200 shipments results in a customer having to contact us with an issue. Grayline welcomes the opportunity to demonstrate to you why many corporations, both large and small, choose Grayline as their supplier and reward us with supplier recognition awards. Grayline is committed to providing the best overall value in the marketplace!



Michael Mason
President & CEO

Started in:


Core Competencies:
Flexible polymer tubing and profiles, including electrical wiring harness and electrical tubing, fluid transfer tubing, chemical resistant tubing, food & beverage tubing, medical tubing, fuel & oil resistant tubing, and pneumatic & hydraulic tubing. We manufacture both heat shrinkable and non-heat shrinkable tubing.
Supplier to the Defense Industry:
Yes, we are a secondary supplier

Number of Employees:

We are:
  • Other
  • small business

Import: No

Export: Yes

Export Countries: 23 countries throughout the world


  • Automotive
  • Aviation and Aerospace
  • Defense Industry Supply Chain
  • Energy Systems
  • Food and Beverage
  • Foxconn
  • Lakeshore Manufacturing Cluster
  • Marine Manufacturing
  • Wisconsin Wind Works


  • CE Marking
  • FDA Registered
  • ISO 9001
  • RoHS Compliant
  • Other: UL/CSA


  • Components, Parts and Hardware
  • Electrical: Wire, Wire Harnesses, Control Systems, Electrical Construction
  • Manufacturing: Plastic Injection Molding and Extrusion

Manufacturing Tier

  • Tier One: Tier one companies are direct suppliers to OEMs. The term is especially common in the automobile industry and refers to major suppliers of parts to OEMs.



Now Hiring

Extrusion Operator

Machine set up and operation experience is strongly preferred. Plastic extrusion experience is also preferred, but we will train the right candidate for the job. Specific Job Duties and Responsibilities: - Set up extrusion lines using proper tooling and following standard operating work instructions - Set up related auxiliary equipment as needed per job - Accurately review written job requirements prior to set up and operation - monitor parts produced and adjust the processes as necessary - Inspect product for conformance to quality requirements - Assist in troubleshooting of production issues and offer both short term and long term solutions - Accurately complete all job related paperwork - Move raw materials and finished goods using forklift and pallet jack To Apply, email resume to

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