This A2P filter is compatible with the TR-619UK turbo unit. Attaches easily to the unit. Recommended for use with the TR-6300FC filter cover to help protect the filter from physical damage. This cover is also used to hold the TR-6600 prefilter or TR-662 spark arrestor in place.Get effective respiratory protection against particulates, and organic gases and vapours with boiling points > 65 °C with 3M™ Versaflo™ A2P Filter, TR-6310E.