A fire extinguisher consists of a body, a shut-off and start device, and a sprayer. There are different types of fire extinguishers, but what makes them recognizable is the combination of these parts.
Let’s start with the body. It’s a tall cylinder, red, if you have something to paint it with. On top there’s the lever and handle of the shut-off and start device, which you need to squeeze to begin extinguishing. A tube comes out of them. On carbon dioxide extinguishers, there’s also a horn nozzle at the end.