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Signs
Flat
Security Icon Set
notice, warning, Error
Black
512x512
notice, Error, Attention
Interface Icon Compilation
signs, Error, notice
People
Character Collection
Character, Attention, people
Basic Icons for Beginners
Error, notice, warning
Computer Security
Error, warning, signs
IndianRed
Production Line Collection
signs, Attention, warning
Khaki
Security
warning, signs, Error
SlateGray
Security Collection
Security Elements
signs, Error, warning
Multimedia icons
mark, Caution, exclamation
risk, warning, signs
Ink Style Collection
symbols, sign, signs
Weather Elements
Error, signs, notice
Tools And Utensils
Car Utensils
Caution, Tools And Utensils, danger
Danger Symbols
notice, Attention, Error
Computer
Web Security
monitor, Alert, exclamation
Maps And Flags
Maps And Flags, World Grid, international
technology
Essential icons
Road sign, technology, warning
shapes
Thick icons
Caution, danger, risk
Airport Terminal
exclamation mark, risk, Caution
Outicons
Maps And Flags, Warning Sign, exclamation
Web
Gentle Edges
triangle, interface, Attention