This is a Screen Resolution icon. We've made it in iOS style, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 12,500 icons, all in the same style and quality.
This appears to be a rectangle situated vertically. There is a vertical line inside the rectangle, going from the bottom left corner of the rectangle to the top right corner. There are two small triangles, one connected to the bottom left of the line and one connected to the top right end of the line.
Related to Screen Resolution Icon
Related icons are the icons with matching tags, as well as all mobile icons. All icons are in the same flat style. You can either download free PNG icons or buy SVG vectors