3M TR-6600 Versaflo Pre-Filter (Pack of 50)

Can extend the service life of TR-600 Series filters by capturing large particles, May reduce operating costs by extending the service life of TR-600 Series filters, Can be used in conjunction with a 3M™ Versaflo™ Spark Arrestor, TR-662, Maintenance free and should be discarded if clogged or damaged, Regular prefilter changeouts can improve system performance and may increase battery life