Graduated Test Tube Icon - Scientific Lab Equipment Illustration #195563 (License: Personal Use)

This minimalist black-and-white vector illustration depicts a standard laboratory test tube with four horizontal graduation marks indicating volume measurements. The design emphasizes clarity and universality, making it suitable for educational materials, scientific publications, and digital interfaces. Its simple outline ensures legibility even at small sizes.

Used on educational websites, lab equipment catalogs, science-themed UI elements, and infographics to represent chemical experiments, measurements, or laboratory work; matches user intent for visual aids in STEM content.