The TG0301B Series from Sainty-Tech Communications Limited is a RF & Microwave Isolator with Frequency 0.25 to 0.45 GHz, Bandwidth 10% (Relative), Average Power Reverse 100 W (Load), Insertion Loss 0.4 dB, Isolation 20 dB. Tags: Coaxial Isolator. More details for TG0301B Series can be seen below.