Graduated Test Tube Icon - Scientific Lab Equipment Illustration #286167 (License: Personal Use)

This minimalist black-and-white vector illustration depicts a standard laboratory test tube with four horizontal graduation marks indicating volume levels. The design emphasizes clarity and functionality, making it suitable for educational materials, scientific interfaces, and health-related visual communication. Its clean lines ensure legibility at any scale.

Used on educational websites, chemistry apps, lab equipment catalogs, and health infographics to symbolize experimentation, measurement, or diagnostics; matches user intent for quick visual recognition of lab tools.