Pióro z atramentem and other 86,700 icons from Icons8 icon pack follow the visual guidelines of the operating systems: Windows, iOS, Android KitKat, and Material. PNG format is free up to 100x100 px. Icons are availble for download in PNG and vector (SVG, PDF, EPS, and more).
The icon is of a quill with ink. The quill is shaped like a feather with a straight vertical line up the middle and a horizontal line at the bottom. The ink is shaped like a square with rounded corners.