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Signs
Flat
Foundation
signs, cancel, forbidden
Black
512x512
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Cats 2
prohibition, Blue
Sienna
128x128
lightbrown, prohibition
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Mixed
Glyph
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
Business & finance
48x48 Free Time Icons
Abort, exclamation, Up
Tomato
48x48
PNG MORE
24x24 Free Application Icons
stop, Abort, Block
24x24
Error, sign, Blocked
Red
Network & communications
Pixel
16x16 Free Application Icons
prohibition, danger, reject
Firebrick
16x16
danger, wind, Gesture
Salmon