The M-42-13-91KW402 from Narda-MITEQ is a 90 Degree Hybrid Coupler with Frequency 400 MHz to 1 GHz, Average Power 1000 W, Insertion Loss 0.2 dB, Isolation 20 dB, Amplitude Balance ± 0.75 dB. Tags: Drop In. More details for M-42-13-91KW402 can be seen below.