The AE121L9192 from Anatech Electronics is a Low Pass RF Filter with Frequency DC to 121.5 MHz, 3 dB Cutoff Frequency 121.5 MHz, Insertion Loss 0.75 dB, Rejection 60 dB, Power 60 W. Tags: Module with Connector, Lumped Component Filter. More details for AE121L9192 can be seen below.