MAXELL 190026 - CA4 Blast Away Canned Air (2 pk)

does it come with a skinny straw to direct the blast of air?

what is the difference between all the air cans

Has anyone used this to blow dust from fan blades inside a Honeywell cool mist room humidifier?

Is this can invertable? I am looking for non invertable to freeze a shaft and remove a bearing.