The CRS-10-165 from Crane Aerospace & Electronics is a Directional Coupler with Frequency 30 to 500 MHz, Coupling 10 dB, Coupling Variation ±1 dB, Frequency Sensitivity ±0.25 dB, Directivity 25 to 30 dB. Tags: Drop-In. More details for CRS-10-165 can be seen below.