The L5331 from Mercury Systems is a Diplexer with Frequency f1 1560.42 to 1590.42 MHz, Frequency f2 1212.6 to 1242.6 MHz, Insertion loss 2 dB, Insertion loss f1 2 dB, Insertion loss f2 2 dB. Tags: Drop In, Lumped Component. More details for L5331 can be seen below.