Test Tube Illustration - Scientific Lab Equipment Diagram #2030396 (License: Personal Use)

This black-and-white line drawing depicts a standard cylindrical glass test tube with a rounded bottom and a threaded screw-cap closure at the top. The illustration emphasizes functional design elements such as the cap’s ridged grip and uniform tube diameter, suitable for depicting general labware in instructional or schematic contexts. The clean, uncluttered style ensures clarity for print or digital use.

Used in science education websites, lab equipment catalogs, medical infographics, or DIY chemistry guides; serves users seeking visual references for basic lab tools or iconography for procedural diagrams.