Simply attach it to the air intake port of your air conditioner fan, and it can effectively catch dust and dust from your work site.
The filter has a strong adhesive on one side and peel off the release paper to install
It strongly sticks to the fan guard surface so you dont have to worry about the filter coming off during work.
Uses flame-retardant self-extinguishing material that is compatible with air conditioning fans from every manufacturer (outer fan frame dimensions 3.3 - 3.9 inches (83 - 100 mm)).