The BWLF-15 from Sainty-Tech Communications Limited is a Low Pass RF Filter with Frequency DC to 15 GHz, 3 dB Cutoff Frequency 15 GHz, Insertion Loss 1.7 dB @15GHz, Rejection 20 dB @22.4GHz, 40 dB @28.9GHz, Power 30 dBm. Tags: Die. More details for BWLF-15 can be seen below.