The AE1370NS2187 from Anatech Electronics is a Band Stop Filter with Stopband Frequency 1.35 to 1.39 GHz, Bandwidth 40 MHz, Insertion Loss 2.25 to 2.75 dB, Rejection 35 dB, Power 6 W. Tags: Module with Connectors, Notch Filter. More details for AE1370NS2187 can be seen below.