Test Tube black outline icon
Upright test tube outline with a rolled rim and a wavy liquid level line
About the Test Tube black outline icon
A round-bottomed test tube stands upright with a thick rolled rim across the top and a wavy line partway down marking the surface of the liquid inside. The full lower half reads as a sample ready for analysis. Use it on lab service pages, chemistry course material, diagnostics dashboards, medical testing forms and science infographics.
Straight parallel walls and the curved base keep the shape calm, while the wave line supplies the only movement and sets the fill level. It pairs with flask, microscope and pipette icons. Place it beside a beaker at equal height for a balanced lab row.
This is the black outline version of the test tube 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.
