The SMC-176D250 from Scientific Microwave Corporation is a Waveguide Tee with Frequency 2.6 to 7.8 GHz, Isolation 15 to 30 dB, Isolation(Co-linear arms) 15 dB, Isolation(E & H arms) 30 dB. Tags: Magic Tee. More details for SMC-176D250 can be seen below.