Replacement Capillary Tubes - Precision Glass for Lab TestingThese Precision Capillary Tubes are designed for use in chromatography kits and laboratory analysis. Made from high quality, uniform glass, they allow for the accurate draw of small liquid samples through capillary action. These tubes are essential for brewers and winemakers performing thin layer chromatography (TLC) to monitor fermentation by products or for other scientific analytical testing in the laboratory. Laboratory Tip: To avoid