Gaśnica 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).
It is an icon of a fire extinguisher. It is the shape of a bottle with a nozzle on top. The nozzle is a rectangle it a cone shape attached on the right side. On the left there is a tiny circle with a string underneath it.