The AE1250SSL1018 from Anatech Electronics is a Low Pass RF Filter with Frequency DC to 1.25 GHz, 3 dB Cutoff Frequency 1.25 GHz, Insertion Loss 1 to 1.5 dB, Rejection 60 dB, Power 15 W. Tags: Module with Connector, Stripline. More details for AE1250SSL1018 can be seen below.