The AL2L19721210 from Actox is a Low Noise Block with Input RF Frequency 19.70 to 20.20 GHz, 20.70 to 21.20 GHz, Output RF Frequency 950 MHz to 1.45 GHz, LO Frequency 18.75 GHz, 19.75 GHz, LO Stability 10 KHz, Gain 55 to 65 dB(Conversion Gain). More details for AL2L19721210 can be seen below.