The LDP-1050-252+ from Mini Circuits is a Space Qualified RF Diplexer with Frequency f1 1 to 1050 MHz, Frequency f2 1650 to 2500 MHz, Insertion loss 0.6 to 2.9 dB, Return Loss 6 to 17 dB, Operating Temperature -40 to 85 Degrees C. Tags: Surface Mount. More details for LDP-1050-252+ can be seen below.