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Signs
Flat
Multimedia icons
risk, warning, signs
Black
512x512
Basic Icons
Alert, exclamation, warning
Banking Icons
exclamation mark, exclamation, danger
Ink Style Collection
symbols, sign, signs
Arrow Collection
dangerous, signs, warning
Multimedia Element Set
danger, Alert, signs
Multimedia Symbols
exclamation, exclamation mark, warning
Instructions
exclamation, signs, Yield
Hand Drawn Construction
sign, signal, triangular
Admin UI
exclamation, warning, shape
Interface and web
sign, interface, Interface And Web
Justicons
symbol, triangle, sign
GraphicsBay Transports
signal, signs, signals
Metrize
sign, signs, symbol
Universalicons
interface, exclamation, signs
Building trade
triangle, sign, signal
Coolicons
Cool Icons, signs, symbol
Surveillance Full
Circle, Alarm, triangle
Essentials
exclamation mark, Circle, exclamation point
sign, Exclamations, Cool Icons
rhombus, Rhomb, signs
Several Stroke
signals, prohibition, sign
Hand Drawn
signs, hand drawn, Alert
Mobile Phones
exclamation, symbol, tools