ORIGINAL Icom FL-133 CW narrow filter in Excellent shape, just tested and used and working fine. Very hard to find these Original Icom filters.  This is a 500 Hz CW filter for the SUB Band/Satellite [10.9491 MHz]. Fits such great radios as: IC-910H, IC-970, IC-821H, and perhaps others. A “must have” for the CW user. Buyer pays shipping for a well packed box.