<!-- Size: 140 px -- >
<a href="/cliparts/f/o/4/o/e/l/test-tube-th.png"><img src="/cliparts/f/o/4/o/e/l/test-tube-th.png" alt='Test Tube clip art'/></a>
<!-- Size: 340 px -- >
<a href="/cliparts/f/o/4/o/e/l/test-tube-md.png"><img src="/cliparts/f/o/4/o/e/l/test-tube-md.png" alt='Test Tube clip art'/></a>
<!-- Size: 640 px -- >
<a href="/cliparts/f/o/4/o/e/l/test-tube-hi.png"><img src="/cliparts/f/o/4/o/e/l/test-tube-hi.png" alt='Test Tube clip art'/></a>
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