Features: Measuring about 100 mm in length, our clear, smooth surfaced capillary tubes provide nice transparency, enabling accurate and in depth observation. Designed to detect melting points, this capillary puncture is a must have tool for comprehensive research or experimentation. Specifications: Material: glass Color: clear Size: about 100 mm in length Package includes: 1000 x Glass capillary tube Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays.