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Snow
Biohazard
WhiteSmoke
32x32
Crystal Like
Black
256x256
QUIET
WP Woothemes Ultimate
Biohazard, nuclear, danger
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Signs & symbols
Glyph
Buttons
Adware, malicious, virus
512x512
Desktop apps
Smooth
Farm-fresh
Caution, Biohazard
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Family & home
Pixel
IconBeast Lite
29x30
Healthcare & medical
MedICO Free Medical Icons
DarkSlateGray
64x64
Shopping & e-commerce
Woothemes Ultimate Icon Set
danger, Biohazard, nuclear
128x128