CORRECTION: Thanks to the alertness of one reader - thanks, Bill, K6WLM - I need to correct the description of the roofing filter offered for sale a few days age. KFL3A-2.1K - This is an 8-pole filter, not a 5-pole as I listed. Der Lesson: People my age should not attempt to type a late-night, tired-brain listing. Sorry for the confusion. Jim, WS6X