The M-12-52-98WF502 from Narda-MITEQ is a 90 Degree Hybrid Coupler with Frequency 100 to 500 MHz, Average Power 800 W, Insertion Loss 0.3 dB, Isolation 20 dB, Amplitude Balance ± 0.8 dB. Tags: Drop In. More details for M-12-52-98WF502 can be seen below.