The RQH-250-500M-3d-SMA(f)-200W-L4 from Raditek is a 90 Degree Hybrid Coupler with Frequency 250 to 500 MHz, Average Power 200 W, Insertion Loss 0.3 dB, Isolation 22 dB, Coupling 3 dB. Tags: Module with Connectors. More details for RQH-250-500M-3d-SMA(f)-200W-L4 can be seen below.