3M™ Versaflo™ Spark Arrestor, TR-662 (Pack of 2)Spark Arrestor can be used with all TR 600 series filters. It helps prevent sparks and other hot particles from damaging the filter and must be used whenever sparks or hot, airborne particles are present in the workplace. The TR 662 spark arrestor also acts as a pre filter by capturing many of the larger particles that would otherwise be drawn into and clog the main filter. The TR 662 spark arrestor may be used with all TR 600 series filters and