The WRMT-187-CPRF-Brass-Iridite from Microtech Inc is a Waveguide Tee with Frequency 3.95 to 5.85 GHz, Isolation 16 to 30 dB, Isolation(Co-linear arms) 16 to 30 dB, Isolation(E & H arms) 16 to 30 dB. Tags: Magic Tee. More details for WRMT-187-CPRF-Brass-Iridite can be seen below.