Beeswift 3M Tr-6600 Versaflo Pre-FilterThe TR 6600 prefilter is designed to protect and extend the service life of 3M Versaflo TR 600 Series filters, helping maintain optimal performance. Key Features: Extend Filter Life Captures large particles to prolong the lifespan of TR 600 Series filters. Cost Effective May reduce operating costs by minimizing the frequency of full filter replacements. Compatible Can be used alongside a 3M Versaflo Spark Arrestor, TR 662. Maintenance Free Should be