The M-42-13-92W412-R from Narda-MITEQ is a 90 Degree Hybrid Coupler with Frequency 400 MHz to 1 GHz, Average Power 250 W, Insertion Loss 0.25 dB, Isolation 20 dB, Amplitude Balance ± 0.75 dB. Tags: Drop In. More details for M-42-13-92W412-R can be seen below.