The AE14S2039 from Anatech Electronics is a Band Stop Filter with Stopband Frequency 11.5 to 17.5 MHz, Bandwidth 6 MHz, Insertion Loss 1 to 3 dB, Rejection 50 dB, Return Loss 15 dB. Tags: Module with Connectors, Notch Filter. More details for AE14S2039 can be seen below.