The new Elecraft site is a little vague regarding roofing filters so I am going by memory. I have two filters in my cart KFL3A-2.8K-IR and KFL3C-400 for my third K3S. Before I hit the purchase button I want to be sure that these are both 8 pole filters. John KK9A Sent via the Samsung Galaxy 7 edge, an AT&T 4G LTE smartphone.