The BWLF-6 from Sainty-Tech Communications Limited is a Low Pass RF Filter with Frequency DC to 6 GHz, 3 dB Cutoff Frequency 6 GHz, Insertion Loss 1.8 dB @6.0GHz, Rejection 20 dB @9.5GHz, 40 dB @12.2GHz, Power 30 dBm. Tags: Die. More details for BWLF-6 can be seen below.