The AF11041 from Werlatone Inc is a Low Pass RF Filter with Frequency 10 to 900 MHz, Stopband Frequency 1.7 to 4 GHz, Insertion Loss 0.6 dB, Rejection 53 dB, Upper Rejection 53 dB@1700 to 4000 MHz. Tags: Module with Connector, Reflectionless Filter. More details for AF11041 can be seen below.