The XLF-221+ from Mini Circuits is a Low Pass RF Filter with Frequency DC to 0.22 GHz, Stopband Frequency 570 MHz to 12 GHz, 3 dB Cutoff Frequency 0.37 GHz, Insertion Loss 1.4 to 1.8 dB, Rejection 12 to 26 dB. Tags: Surface Mount, Reflectionless Filter. More details for XLF-221+ can be seen below.