Graduated Test Tube Icon - Lab Equipment Illustration #297215 (License: Personal Use)

This black-and-white line illustration depicts a classic U-shaped graduated test tube, featuring four horizontal calibration lines indicating volume measurements. The design is minimalistic and universally recognizable, suitable for scientific diagrams, educational materials, or digital interfaces requiring lab equipment icons. Its clean vector aesthetic ensures clarity at any scale.

Used in educational websites, chemistry textbooks, lab safety guides, or UI elements for science apps; matches user intent for finding clear, royalty-free lab equipment imagery for instructional or informational content.