The logo for Header 2 is plain text. It has the letter H next to the letter 2 and both are drawn in square lettering with black bordering and an empty middle.
This Header 2 icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 6,200 icons, all in the same style and quality.