The XLF-122+ from Mini Circuits is a Low Pass RF Filter with Frequency DC to 1.15 GHz, Stopband Frequency 2.19 to 21 GHz, 3 dB Cutoff Frequency 1.51 GHz, Insertion Loss 1.4 to 1.8 dB, Rejection 11 to 21 dB. Tags: Surface Mount, Reflectionless Filter. More details for XLF-122+ can be seen below.