The BWLF-19G from Sainty-Tech Communications Limited is a Low Pass RF Filter with Frequency DC to 19 GHz, 3 dB Cutoff Frequency 19 GHz, Insertion Loss 1.7 dB @19GHz, Rejection 20 dB @26.3GHz, 40 dB @31.2GHz, Power 30 dBm. Tags: Die. More details for BWLF-19G can be seen below.