The ZXLF-K173+ from Mini Circuits is a Low Pass RF Filter with Frequency DC to 17 GHz, Stopband Frequency 25 to 40 GHz, 3 dB Cutoff Frequency 18 GHz, Insertion Loss 2.3 to 2.8 dB, Rejection 18 to 25 dB. Tags: Module with Connector, Reflectionless Filter. More details for ZXLF-K173+ can be seen below.