The BWLF-7 from Sainty-Tech Communications Limited is a Low Pass RF Filter with Frequency DC to 7 GHz, 3 dB Cutoff Frequency 7 GHz, Insertion Loss 1.7 dB @7.0GHz, Rejection 20 dB @10.75GHz, 40 dB @13.4GHz, Power 30 dBm. Tags: Die. More details for BWLF-7 can be seen below.