The ATi12-18 from Narda-ATM is a RF & Microwave Isolator with Frequency 12 to 18 GHz, Average Power 2 W, Average Power Forward 2 W, Peak Power Forward 0.03 kW, Insertion Loss 0.45 to 0.5 dB. Tags: Module with Connector, Coaxial Isolator. More details for ATi12-18 can be seen below.