PEEKsil Tubing has a fused silica core providing an ideal fluidic pathway. It executes a consistent and rigid fluid pathway with extremely tight tolerances and industry-accepted chemical properties. Our PEEKsil Tubing has excellent chemical compatibility and extremely low absorption characteristics. This PEEKsil Tubing comes in a 10cm, 15cm, 50cm 2 pack of orange and a 20cm 2 pack of natural color.