Polymer Capillary Tubing

Polymer Capillary Tubing

Enabling the Vision of Tomorrow Through Custom Microfluidic Handling

Incom’s polymer capillary tubing is available in a wide variety of sizes and materials types. Custom medical-grade capillary tubes are also available and manufactured in a cleanroom-enclosed draw tower. Incom’s unique manufacturing technique allows for a wide range of inside and outside dimensions and significantly smaller sizes than what is typically available commercially.

The capillaries can be clear, flexible, and with single, multi-hole, or other unique patterns and shapes. Our process is scalable and fully customizable to meet your individual requirements.

Our Unique Process

Our capillary tubing manufacturing process is similar to that of glass optical fiber.  This process allows us to achieve tighter tolerances and smaller diameters than an extrusion process.

Custom Medical Grade Capillary Tubes


  • High open area ratio (up to 90%)
  • Precision tolerances
  • Square tubing and other custom outer geometry
  • Custom wall thickness and designs, including thin-walled tubes
  • Hole diameters of 25 μm and larger (smaller may be available depending on material type)
  • Wide variety of polymer material options
  • Single hole/lumen plastic capillary tubing
  • Multi-hole/multi-lumen tubing
  • Microbore, microtube and microcapillary tubing (also miniature and microtubing)


  • Microfluidic analysis
  • Liquid measurement
  • Liquid transfer
  • Gas chromatography
  • Capillary liquid chromatography
  • Capillary electrophoresis
  • Raman spectroscopy
  • Most thermoplastics
  • Commodity plastics: Acrylic (PMMA, Poly (methyl methacrylate), Polycarbonate, Polystyrene (PS) , PETG, NAS21 and other styrene acrylic copolymers
  • Fluoropolymers: FEP, MFA, PFA, THV, ETFE, PVDF, PCTFE
  • Specialty plastics: Radel, UDEL, ULTEM, Zeonor, Zeonex, APEL, OKP1, LDPE, Polypropylene (PP), TPX, Topaz, CAB
  • Medical grade materials

Please contact us if a material you are interested in is not listed.