These 200-piece glass capillary tubes are essential laboratory supplies designed for precision work in scientific and educational settings. Crafted from premium borosilicate glass, each micro pipette measures 75mm in length with precise 1.1mm inner diameter and 1.5mm outer diameter specifications. The open both ends design facilitates easy sample loading and smooth liquid transfer, making them perfect for TLC spotting, melting point determination, sample collection, and various laboratory applications. Their excellent durability and heat resistance ensure reliable performance across multiple uses. This bulk pack offers exceptional value for research labs, universities, hospitals, and quality control facilities that require consistent, high-quality glass pipettes for daily operations. Whether you're conducting chromatography analysis or routine lab tests, these capillary tubes deliver the accuracy and durability that professional scientists demand.