PNG ICO ICNS SVG MORE
Mixed
Glyph
Basic icon element
danger, warning, safety
Black
512x512
PNG SVG MORE
Simple darkcon
problem, warning, Caution
PNG ICO ICNS MORE
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
SEO & web
Metro Uinvert Dock
Lan, Caution
Orange
256x256