Test Tube Icon - Science Lab Equipment Illustration #1858923 (License: Personal Use)

This monochrome vector-style icon depicts a classic cylindrical test tube with a rounded bottom and four horizontal measurement lines along its side. The design emphasizes clarity and recognizability, making it suitable for digital interfaces, educational materials, and scientific documentation. Its bold outline ensures legibility even at small sizes.

Used in STEM education platforms, laboratory supply catalogs, health science blogs, and app icons where a universal symbol for chemical or biological testing is needed. Matches user intent for quick visual identification of lab equipment.