The MT 11A-SQB-(**)-B from The Waveguide Solution is a Waveguide Tee with Frequency 3.7 to 4.2 GHz, Isolation 20 to 35 dB, Isolation(Co-linear arms) 35 dB, Isolation(E & H arms) 20 dB. Tags: Magic Tee. More details for MT 11A-SQB-(**)-B can be seen below.