Graduated Test Tube Icon - Science Lab Equipment Illustration #3533313 (License: Personal Use)

This minimalist black-and-white icon depicts a standard laboratory test tube with four evenly spaced horizontal graduation marks along its side, indicating volume measurements. The tube has a rounded bottom and a slightly flared rim, typical of glassware used in scientific experiments. The design emphasizes clarity and recognizability, making it suitable for digital interfaces and instructional materials.

Used on educational websites, science blogs, lab equipment catalogs, or health/medical dashboards to symbolize experimentation, diagnostics, or chemical analysis. Matches user intent for visual cues related to laboratory work or STEM topics.