TR-6310E 3M™ Versaflo™ A2P filter provides protection against organic gases and vapors (boiling point > 65°C) and particles; the filter is designed for use with the 3M™ Versaflo™ TR-600 Air Powered Unit; apply the filter directly to the unit's turbo; recommended for use with TR-6300FC filter cover to protect against physical damage; the filter cover is also used to hold the TR-6600 prefilter or TR-662 spark arrester; in case of saturation, damage or wear, replace with original 3M™ accessories