The QLB350M21P5SSM from Q Microwave is a Band Pass Filter with Frequency 312.5 to 387.5 MHz, Center Frequency 350 MHz, Insertion Loss 2.5 dB, Rejection 40 dBc @ 275 MHz & 425 MHz, Power 0.1 W. Tags: Surface Mount, Lumped Component Filter. More details for QLB350M21P5SSM can be seen below.