Reactor Icon from Iron Man Icons
Iron Man Icons are available in sizes 48x48, 64x64, 128x128, 256x256, and 512x512 pixels, in JPEG, PNG, BMP, ICO, ICNS formats.
Default license: Linkware (Backlink to [link]
Commercial usage: Not allowed
Copyright holder of the characters is "Marvel Comics"
Download page: [link]