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Mixed
Glyph
Basic icon element
danger, warning, safety
Black
512x512
Free Misc Icon Set 2
Error, sign, fill
Error, Alarm, warning
Simple Geometric Icons
Exit, delete, Close
Locations - Solid
training, ride, Bikes
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Simple darkcon
warning, Error, skull
324x512
problem, warning, Caution
Icons prohibition
prohibition sign, warning, impossible
prohibition sign, prevention, prohibiting sign
impossible, prohibition, prohibiting sign
roller skates, prohibition, impossible
prohibition, prevention, Cigarette
prohibiting sign, interdiction, prohibition
prohibiting sign, prohibition sign, impossible
impossible, prohibition sign, prevention
Bicycle, interdiction, prevention
prohibition sign, impossible, prohibition
Material Core
sign, warning
Geomicons
warning