This air cleaner element is supplied from original manufacturer. It is specially designed for use with Briggs and Stratton engines used on lawn and garden equipment. It is used to filter out dust from entering the carburetor and the engine. This filter element is made out of foam material and it is sold individually. Please note, the air ...Read morecleaner cartridge is sold separately. Replacing this filter is a simple task that does not require any tools. • Unscrew the cover knob • Remove the cover • Remove old element • Secure the new element in place • Reassemble and test the unit