This is a 100ml (3.4 oz) bottle of air filter oil. This is an excellent sticky oil to keep dirt and dust from entering your carburetor. The best method is to pour a small amount of oil in a plastic bag and then put your filter in the bag and squeeze the filter so the oil distributes throughout the foam. The oil is very so make sure you squeeze any excess oil out before installing on your car. Once the oil dries it will become very sticky.
Good thin stuff and not like some off that air blocking thick stuff. Just pour a little bit in a Ziploc bag and put your air filter in it, few squeezes and done, plus squeeze out any excess with a paper towel.