This is part of a series of icons used in templates on various Wikipedias to represent the merging or splitting of content. Both GIF and SVG renditions of each exist. The GIFs exist for reasons of uniformity and backward compatibility. (In Windows versions of Microsoft Internet Explorer prior to version 7 and some versions of other browsers, they render without transparency. For a small number of users, they fail to display at all.) The SVGs, while not exact replicas of the original GIFs, are superior when displayed at sizes greater than the GIFs' native dimensions. For example, see the two renditions of the "Merge-arrow" icon at 275 pixels:
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