【Quality Material】: This handheld spectroscope is crafted from premium optical glass, ensuring clear and accurate spectral observations. The combination of a composite prism and condenser lens within the vertical tube enhances its functionality 【Versatile Spectral Analysis】: Ideal for various spectral analysis applications, this device is fit for amateur enthusiasts, budding scientists, student lab, and science fair projects. It offers high resolution while being simple and economical to use 【Easy Observation】: By holding the spectroscope with the slit facing a light source, users can observe a dispersed spectrum as parallel light beams pass through the prism. When used with fluorescent lights, mercury's line spectrum can be seen against a continuous spectrum background 【Safe Observation】: For solar observations, utilize reflected sunlight via a mirror instead of direct sunlight to ensure safe usage without compromising on observation quality 【Compact Design】: Measuring just 10 cm in length and featuring an attractive blue casing, this spectroscope is both portable and stylishly designed for ease of use in various settings Specification: Material: Optical Glass Size Chart: L*W: 10cmx2.4cm/3.94inchx0.94inch Package Includes: 1 Handheld Spectroscope Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.