The CSM-30-17.82G SQ from Crane Aerospace & Electronics is a Directional Coupler with Frequency 17300 to 18400 MHz, Coupling 30 dB, Coupling Variation ±1.25 dB, Frequency Sensitivity ±0.75 dB, Directivity 15 dB. Tags: Module with Connectors. More details for CSM-30-17.82G SQ can be seen below.