Inrad Filters #753 9000.6kHz 400Hz #754 9001.5kHz 2800Hz #750 6299.25kHz 400Hz #755 6298.5kHz 2800Hz Would like to sell all together $300.00 plus shipping. Money Order preferred. Contact Ed K7UC janed at burgoyne.com Telephone 801-731-9667 Ed K7UC