The 27001A-40 from Narda-MITEQ is a Directional Coupler with Frequency 6 to 18 GHz, Coupling 40 dB, Coupling Variation ±1.0 dB, Frequency Sensitivity ±0.7 dB, Directivity 10 to 12 dB. Tags: Module with Connectors. More details for 27001A-40 can be seen below.