The TR-662 spark arrestor may be used with all TR-600 series filters and cartridges. It helps prevent sparks and other hot particles from damaging the filter/cartridge, and can be used as a cleanable prefilter.The TR-662 spark arrestor may be used with all TR-600 series filters and cartridges. It helps prevent sparks and other hot particles from damaging the filter/cartridge 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 load the main filter. The TR-662 may be cleaned and reused in accordance with the User Instructions.