Test Tube Illustration - Scientific Lab Equipment Icon #101538 (License: Personal Use)

This minimalist black-and-white line art depicts a standard conical-bottom test tube with four evenly spaced horizontal calibration lines on its side. The design emphasizes clarity and functionality, making it suitable for scientific diagrams, educational materials, or digital interfaces requiring lab equipment symbolism. Its simplicity ensures high legibility at small sizes and scalability across devices.

Used in science education websites, lab procedure guides, medical infographics, or as an icon in health-tech applications; matches user intent for visual representation of chemical experiments, diagnostics, or general laboratory tools.