Mask for overlaying of several BSicons.
<a href="//commons.wikimedia.org/wiki/User:Axpde" title="User:Axpde">axpde</a>
2013-03-31
Own work based on: <a href="//commons.wikimedia.org/wiki/File:BSicon_MASKq.svg" class="mw-redirect" title="File:BSicon MASKq.svg">BSicon MASKq.svg</a>