The TX9Z4 from Sonoma Scientific is a RF & Microwave Isolator with Frequency 960 MHz to 1.16 GHz, Peak Power 250 W, Insertion Loss 0.45 dB, Isolation 17 dB, Operating Temperature -40 to 70 Degree C. Tags: Drop-In, Drop-In Isolator. More details for TX9Z4 can be seen below.