The CRS-20-110 from Crane Aerospace & Electronics is a Directional Coupler with Frequency 10 to 400 MHz, Coupling 20 dB, Coupling Variation ±1 dB, Frequency Sensitivity ±0.25 to ±0.5 dB, Directivity 20 to 25 dB. Tags: Drop-In. More details for CRS-20-110 can be seen below.