Especially for XRD (X-ray diffraction) measurements for quick connection to a pumping system, this capillary was manufactured with a Luer-connector. The capillary is perfused with the to be analysed sample, which can be catched afterwards. The thin-walled part of the capillary has a wall-thickness of little micrometers to affect minimally the measurements. Different diameters are possible. The Luer-lock-connector consists of inert PP (polypropylene).