What Size of Peek tubing should I pick?

For frequent use on an analytical HPLC system, 1/16 inch outer diameter x 0.010 inch inner diameter PEEK tubing is often used as it provides adequate pressure and a small enough inner diameter that does not significantly affect sample bandwidth.

For high-pressure semi-preparative or preparative liquid chromatography systems, it's recommended to use 1/8 inch outer diameter PEEK tubing.

On the Agilent 1100 HPLC system with high-pressure flow paths, 1/32 inch outer diameter PEEK tubing is used.

The commonly used capillary column specification for micro-scale chromatography, electrophoresis, or electrochromatography is a 360 µm outer diameter.

Available in various outer diameters such as 1/16", 1/8", and 1.8 mm with multiple inner diameter options ranging from 0.010" (0.25 mm) to 0.080" (2.00 mm).

PEEK capillaries are available in sizes of 360µm, 560µm, and 1/32 inch outer diameters, with inner diameters ranging from 50 µm to 0.50mm, achieving high precision for both the inner and outer diameters up to ±0.0005".

PEEK tubing is suitable for high-pressure systems, with most cases having a pressure rating of 500