The 137-830A-2-2-2-2 from Narda-ATM is a Waveguide Tee with Frequency 5.9 to 6.4 GHz, Isolation 16 to 30 dB, Isolation(Co-linear arms) 16 dB, Isolation(E & H arms) 30 dB, Balanced (dB) ± 0.15 dB. Tags: Magic Tee. More details for 137-830A-2-2-2-2 can be seen below.