A clean air filter is essential to the performance of an air compressor. Keep extras on hand as you will inevitably replace it, sometimes often (if used in a contractor or shop application). Some filters have paper elements like automotive air filters, some are simply foam or felt mediums. The filter installs into the inlet side of the pump head and filters out particulates that can damage the pump. Replace every three months or sooner (if used in a shop or jobsite), or whenever you change the oil.
3-Nailer Combo Kit w/ Accessories
3-Nailer Combo Kit
1/4" x 50 Ft Noodle Air Hose with Coupler and Plug