The T173181/DB from Smiths Interconnect is a RF & Microwave Isolator with Frequency 17.3 to 18.1 GHz, Average Power Forward 20 W, Average Power Reverse 0.5 W, Peak Power Forward 0.05 kW, Insertion Loss 0.6 dB. Tags: Drop-In, Drop-In Isolator. More details for T173181/DB can be seen below.