K&P S15 filter with a 3/4x16 nipple, fits the same as a CH48110-1 filter. The nipple can be removed for other applications. I had this on my IO-540 for a couple of years. Now the pandemic is over, I'm switching back to paper filters. It has worked great and is very easy to clean. It has a magnet that traps fuzz and also has a ball bypass. It has been drilled for safety wire and I had it engraved on the end with the torque value. It comes with about 24 replacement X O-rings and filter tool. Asking $125 + Postage
