I have for sale an Icom FL100 500hz CW filter, and a FL223 1.9khz SSB filter. Work in many recent Icom models like the 706/725/729/746/756 models. These will not work in the 718, 707, and 703 radios. These make a big difference on receive. I am asking $78 each shipped in the US, and can take paypal/check/MO. 73 John AF5C