The LBF-1050/500-J13 from Leader-MW is a Band Pass Filter with Frequency 850 to 1300 MHz, Insertion Loss 1.5 dB, Upper Rejection 50 dB, Lower Rejection 50 dB, VSWR 1.70:1. Tags: Module with Connectors, Cavity Filter. More details for LBF-1050/500-J13 can be seen below.