This microcatheter is made from high-quality polyethylene, offering exceptional durability and resistance to chemicals, thus meeting the challenging demands of laboratory work. A key feature of this device is its dramatically reduced inner volume, significantly decreasing fluid waste and increasing the accuracy of fluid delivery—crucial for conducting experiments with precise fluid measurement requirements. Furthermore, the integration of a 4-way stopcock not only facilitates direct compatibility with industrial-standard syringes but also enhances the setup process by eliminating the need for additional adapters, thereby boosting procedural efficiency and offering versatile control over fluid direction.