The CSM-30-19.85G SQ from Crane Aerospace & Electronics is a Space Qualified Coupler with Frequency 17.7 to 22 GHz, Frequency Sensitivity ±0.75 dB, Coupling 30 dB, Coupling Variation ±1.5 dB, Power 1 W. Tags: Module with Connectors. More details for CSM-30-19.85G SQ can be seen below.