Test Tube Rack Diagram - Lab Equipment Illustration #3894495 (License: Personal Use)

This black-and-white isometric line drawing shows six cylindrical glass test tubes inserted into a transparent two-tiered rack with circular cutouts. The perspective highlights both the upper and lower rows, emphasizing structural organization and spatial arrangement typical in laboratory settings. The minimalist style ensures clarity for instructional or schematic use.

Commonly used in educational websites, chemistry or biology textbooks, lab safety guides, and scientific software interfaces to represent standard lab equipment. Matches user intent for visual reference, diagramming, or iconography in STEM content.