The AE12000L9225 from Anatech Electronics is a Low Pass RF Filter with Frequency DC to 12 GHz, 3 dB Cutoff Frequency 12 GHz, Insertion Loss 0.4 to 1.2 dB, Rejection 25 to 55 dB, Power 50 W. Tags: Module with Connector. More details for AE12000L9225 can be seen below.