This is the Świece japońskie 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.
The icon shows a vertical rectangle with small tabs sticking out the top and bottom, then slightly higher to the right is another one that looks the same but is dotted. A little lower to the right is a duplicate of the dotted shape. At to the top right of that one is another duplicate of the dotted shape.