The SMC-176D250S from Scientific Microwave Corporation is a Waveguide Tee with Frequency 2.50 to 7.50 GHz, Isolation 12 to 30 dB, Isolation(Co-linear arms) 12 dB, Isolation(E & H arms) 30 dB. Tags: Magic Tee. More details for SMC-176D250S can be seen below.