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PEEK Capillary

Tubing in PEEK for general lab use. PEEK is a inert fluoropolymer, with a high chemical compatibility and a working temperature range of -50°C up to +250°C. This PEEK capillary tubing can be used in a microfluidic system for demanding applications with high pressure or agressive fluids, but also as a fluidic resistance.
  • PEEK5600G

  • ChinaPEEK

  • ID 0.3mm ~11mm

  • Natural, black or customied color


Product Description

PEEK Capillary|Medical Grade

PEEK capillary (1)

Our high pressure tubing includes bioinert PEEK, formally known as poly ether ether ketone. 

PEEK is a high-performance engineered polymer with mechanical and chemical resistance properties that absorb high temperatures, making it highly resistant to thermal degradation.

PEEK tubing has one of the highest strength-to-weight ratios of any thermoplastic and the strength required to withstand continuous use at HPLC pressure. Its distinct materials make it inert to most solvents and give it a smooth internal surface that improves the resolution of sample bands. 

With its introduction into the marketplace, PEEK materials have become a popular replacement for stainless steel tubing for fluidic needs.

PEEK vs. Stainless Steel Tubing

PEEK acts as an excellent alternative for stainless steel tubing in high pressure applications and analytical systems. Its mechanical properties allow it to be used in many situations where stainless steel would become too reactive. Unlike stainless steel, PEEK tubing is flexible and can be easily cut into preferred lengths with a razor blade. PEEKs internal surface is much smoother than that of metal tubing, thereby reducing the risk of dilution and remixing of samples.

PEEK capillary (3)


  • Flexible

  • Lightweight

  • Excellent mechanical and chemical stability

  • Smooth Internal Surface

  • Easy cut to desired lengths

  • Alternative for stainless steel tubing

  • Available in many sizes and color schemes

  • Bioinert

  • High Temperature Resistance

Product tables

Our PEEK tubing is available in many sizes and in color schemes to help differentiate identification. It can also be connected and utilized with our stainless steel or polymer fittings. Choose the right product for your fluidic needs below today. If you have inquiries, questions or requests please contact us.

PEEK Tubing Size


1             φ0.5             φ0.3 φ0.4            
2             φ0.8             φ0.3 φ0.4 φ0.5 φ0.6            
3             φ1.0             φ0.4 φ0.6 φ0.8 φ0.9            
4             φ1.2             φ0.3 φ0.5 φ0.7 φ0.9 φ1.1            
5             φ1.4             φ0.4 φ0.6 φ0.8 φ1.0 φ1.2            
6             φ1.5             φ0.3 φ0.5 φ0.7 φ0.9 φ1.1 φ1.3            
7             φ1.6             φ0.3 φ0.5 φ0.7 φ0.9 φ1.1 φ1.3 φ1.5            
8             φ1.8             φ0.4 φ0.6 φ0.8 φ1.0 φ1.2 φ1.4 φ1.5 φ1.6 φ1.7            
9             φ2.0             φ0.3 φ0.5 φ0.7 φ0.9 φ1.0 φ1.2 φ1.4 φ1.6 φ1.7 φ1.8            
10             φ2.2             φ0.4 φ0.6 φ0.8 φ1.0 φ1.2 φ1.4 φ1.6 φ1.8 φ2.0 φ2.1            
11             φ2.4             φ0.3 φ0.5 φ0.7 φ0.9 φ1.1 φ1.3 φ1.5 φ1.7 φ1.9 φ2.1 φ2.3            
12             φ2.6             φ0.4 φ0.6 φ0.8 φ1.0 φ1.2 φ1.4 φ1.6 φ1.8 φ2.0 φ2.2  φ2.4  φ2.5            
13             φ2.8             φ0.3 φ0.5 φ0.7 φ0.9 φ1.1 φ1.3 φ1.5 φ1.7 φ1.9 φ2.1 φ2.3 φ2.5 φ2.7            
14             φ3.0             φ0.4 φ0.6 φ0.8 φ1.0 φ1.2 φ1.4 φ1.6 φ1.8 φ2.0 φ2.2  φ2.4  φ2.6 φ2.8 φ2.9            
15             φ3.2             φ0.3 φ0.5 φ0.7 φ0.9 φ1.1 φ1.3 φ1.5 φ1.7 φ1.9 φ2.1 φ2.3 φ2.5 φ2.7 φ2.9 φ3.0            
16             φ4.95             φ4.15 φ4.25 φ4.35 φ4.55            
17             φ10             φ8.7            
18             φ12             φ10 φ11            
19             1/32"             φ0.25 φ0.5            
20             1/16"             φ0.1 φ0.13 φ0.25 φ0.36 φ0.5 φ0.75 φ1.0 φ1.2            
21             1/8"             φ0.5 φ0.75 φ1.0 φ1.2 φ2.0 φ2.2