CW KFL3A-400 400 Hz, 8-pole 130.95 KFL3A-250 250 Hz, 8-pole 130.95 SSB/AM/FM KFL3A-6K 6 kHz AM / ESSB, 8-pole (req'd for AM) ** 130.95 KFL3B-FM 13 kHz FM (required for FM) ** 130.95 KFL3A-2.8_2.7sw 2.8 kHz 8-pole REPLACEMENT for the standard 2.7 kHz 5 -pole filter (New K3 and KRX3 orders only) 120.95 KFL3A-1.8K 1.8 kHz, 8-pole * 130.95 262.00 262 524 130 654.00 - filters 1949.95 -radio kit + 180.00 KBPF3 General Coverage RX Bandpass Module (Adds coverage outside of ham bands. Install on main and/or sub RX) 139.95 KUSB USB (Universal Serial Bus) Adapter for the K3 (Now uses the FTDI chipset - 8/4/10) Click here for the KUSB Window, Mac and Linux Drivers 39.95