The CRZ-11B-500 from Crane Aerospace & Electronics is a Directional Coupler with Frequency 10 to 1000 MHz, Coupling 11 dB, Coupling Variation ±1 dB, Frequency Sensitivity ±1 dB, Directivity 13 to 20 dB. Tags: Surface Mount. More details for CRZ-11B-500 can be seen below.