The 1CS0218-10 from Werbel Microwave is a Directional Coupler with Frequency 2 to 18 GHz, Coupling 10 dB, Coupling Variation ±1 dB, Directivity 12 dB, Average Power 10 to 25 W. Tags: Module with Connectors. More details for 1CS0218-10 can be seen below.