Mysterious CO2 gadjey

[rappja]

Can anyone tell me what this is? I found it on the Ranger Tug R-31 I bought.

 

[Submariner]

Threaded Drain Gun CO2 Cartridge Gallo Drain Gun Blaster Cleaner with Flexible Hose Air Conditioner Cleaner Blaster Opener Kit​

https://www.amazon.com/Natudeco-Threaded-Cartridge-Flexible-Conditioner/dp/B0C64JRFRH

 

[Jcat2010]

Made to "blow out" ac condensate drain lines. Or any other similar line, like sink drain. Also good for blowing dust off anything else.