The MT 12-SQB-(**)-B from The Waveguide Solution is a Waveguide Tee with Frequency 4.9 to 5.5 GHz, Isolation 18 to 38 dB, Isolation(Co-linear arms) 38 dB, Isolation(E & H arms) 18 dB. Tags: Magic Tee. More details for MT 12-SQB-(**)-B can be seen below.