Test Tube Illustration - Scientific Lab Equipment Icon #1858804 (License: Personal Use)

This minimalist black-and-white line illustration depicts a standard conical-bottom test tube featuring four horizontal calibration marks along its body. The design emphasizes clarity and recognizability, making it suitable for diagrams, infographics, and digital interfaces where scientific accuracy and visual simplicity are valued.

Used in educational materials, science websites, lab manuals, and health-tech platforms to represent chemical analysis, diagnostics, or experimental procedures; matches user intent for visual explanation of lab equipment or procedural steps.