The ZXLF-K73+ from Mini Circuits is a Low Pass RF Filter with Frequency DC to 7 GHz, Stopband Frequency 11.7 to 21.3 GHz, 3 dB Cutoff Frequency 9.4 GHz, Insertion Loss 1.6 to 2.5 dB, Rejection 11 to 15 dB. Tags: Module with Connector, Reflectionless Filter. More details for ZXLF-K73+ can be seen below.