Selling a new Airinum air filter mask. Each reusable filter lasts three months.
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I bought one too many, each for about 90,000krw, including taxes and customs.
I ask for 70,000 krw, and I will throw in a couple extra filters as a thank you for taking this off my hands (total 4 filters).
I'm currently using one, and it works great. Fine/yellow dust is a carcinogen. Protect your lungs!
Price is negotiable.