The XLF-641M+ from Mini Circuits is a Low Pass RF Filter with Frequency DC to 0.5 GHz, Stopband Frequency 1.1 to 13 GHz, 3 dB Cutoff Frequency 0.64 GHz, Insertion Loss 1.9 to 2.8 dB, Rejection 21 to 43 dB. Tags: Surface Mount, Reflectionless Filter. More details for XLF-641M+ can be seen below.