This is the Żaluzje w dół icon for Windows 10. Here we go. Optimized for 32x32 px, these are the simplest icons in the line style. Downloadable formats are PNG and SVG, among others. Icons8 icon pack is unique in providing a huge number of icons designed by the same team of four designers who create the new icons every working day in the same style and with the same quality. Same cool as the Bat Face, huh.
This icon shows a square window that is half covered in blinds, and half uncovered. The blinds cover the top half and under there is an arrow pointing down alongside a pulley to lower and raise the blind.