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Mixed
3D
Noiro
Alert, warning
Chocolate
128x128
Iconza
warning
Black
32x32
IndianRed
DarkGray
DarkSeaGreen
MediumVioletRed
DarkSlateGray
SlateBlue
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Webtoys
warning, sign
SandyBrown
64x64
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Soft media icons vol 2
Silver
33x33
Vista Style Base Software
Attention, Alert, Achtung
256x256
grey, warning, shield
I like buttons
RoyalBlue
SeaGreen
Web Application Icons Set
Gold
48x48
Nuove
warning, cancel, stop
Firebrick
Orange