The PB1511WB from A1 Microwave is a Waveguide Filter with Frequency 3.7 to 4.2 GHz, Insertion Loss 0.2 dB, Rejection 75 to 90 dB, Rejection Frequency DC to 3.2 GHz, 4.6 to 4.9 GHz, 4.9 to 10.5 GHz. Tags: Band Pass. More details for PB1511WB can be seen below.