The BWLF-18GA 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 2.5 dB @18GHz, Rejection 20 dB @21.5GHz, 40 dB @23-35GHz, Power 30 dBm. Tags: Die. More details for BWLF-18GA can be seen below.