The 3M™ Versaflo™ Prefilter can extend the service life of the particulate (HE) element of 3M™ Versaflo™ Filters and Cartridges, TR-600 and TR-800 Series by capturing large particles that may otherwise clog the HE filter.Delve into 3M filters and explore the variety of respirator cartridges available for 3M Powered Air Purifying Respirators (PAPRs).