The MT 20-SQB-(**)-B from The Waveguide Solution is a Waveguide Tee with Frequency 17.7 to 26.5 GHz, Isolation 21 to 30 dB, Isolation(Co-linear arms) 21 dB, Isolation(E & H arms) 30 dB. Tags: Magic Tee. More details for MT 20-SQB-(**)-B can be seen below.