The AF9255 from Werlatone Inc is a Low Pass RF Filter with Frequency 10 to 170 MHz, Stopband Frequency 300 MHz to 1.5 GHz, Insertion Loss 0.6 dB, Rejection 50 dB, Upper Rejection 50 dB@300 to 1500 MHz. Tags: Module with Connector, Reflectionless Filter. More details for AF9255 can be seen below.