The DBL-340420-10-35 from GeoSync Microwave is a Low Noise Block with Input RF Frequency 3.4 to 4.2 GHz, Output RF Frequency 950 MHz to 1.75 GHz, LO Frequency 6 GHz, 9.55 GHz, Gain 50 dB, Gain Flatness ±1 dB. More details for DBL-340420-10-35 can be seen below.