The CX1R1 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 131 to 147 MHz, Average Power 2 kW, Average Power Forward 2 kW, Insertion Loss 0.4 dB, Isolation 18 dB. Tags: Module with Connectors, Coaxial Isolator. More details for CX1R1 can be seen below.