The BWLF-18G from Sainty-Tech Communications Limited is a Low Pass RF Filter with Frequency DC to 18 GHz, 3 dB Cutoff Frequency 18 GHz, Insertion Loss 1.7 dB @18GHz, Rejection 20 dB @25.2GHz, 40 dB @29.2GHz, Power 30 dBm. Tags: Die. More details for BWLF-18G can be seen below.