The AF9187 from Werlatone Inc is a Low Pass RF Filter with Frequency 10 to 490 MHz, Stopband Frequency 850 MHz to 3 GHz, Insertion Loss 0.55 dB, Rejection 45 dB, Upper Rejection 45 dB@850 to 3000 Mhz. Tags: Module with Connector, Reflectionless Filter. More details for AF9187 can be seen below.