Laboratory Test Tube Rack black outline icon
Four stoppered test tubes with liquid standing in a rack inside a circle outline
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About the Laboratory Test Tube Rack black outline icon
Four test tubes stand side by side in a two-bar rack, each capped with a flat stopper and half filled with a ribbed liquid marking. A circular border frames the set. It communicates sample testing, diagnostics, analysis and scientific research, so it suits medical lab websites, blood test booking flows, pharmaceutical product pages, school chemistry material and research report slides.
The rack bar anchors the four tubes on a shared baseline, giving the icon a stable rectangular mass that balances the round frame. It pairs naturally with microscope, flask, petri dish and syringe icons, and the tube fill pattern stays clean from 32 px upward.
This is the black outline version of the laboratory test tube rack icon: even, monoline strokes that stay crisp at small sizes and suit clean, minimal interfaces, wireframes and light backgrounds.
Download it free as a scalable SVG vector or transparent-background PNG in seven sizes (16 to 512px), copy the SVG code straight into your project, or open it in the free online editor to change colors, apply gold, silver, neon and gradient styles, animate it, or convert it to EPS, PDF and DXF.
Free for personal and commercial use with attribution.
