The ZXLF-K123+ from Mini Circuits is a Low Pass RF Filter with Frequency DC to 12 GHz, Stopband Frequency 18.1 to 29 GHz, 3 dB Cutoff Frequency 14.2 GHz, Insertion Loss 1.4 to 2.5 dB, Rejection 18 to 24 dB dB. Tags: Module with Connector, Reflectionless Filter. More details for ZXLF-K123+ can be seen below.