The WBLB-T-BP-0.5-0.1-L from A-Info is a Band Pass Filter with Frequency 0.45 to 0.55 MHz, Insertion Loss 1 dB, Rejection 20 to 50 dB, VSWR 1.50:1, Operating_Temperature -20 to 50 Degree C. Tags: Module with Connectors, Lumped Component Filter. More details for WBLB-T-BP-0.5-0.1-L can be seen below.