The RFWA42E9F from RF-Lambda is a Waveguide to Coax Adapter with Frequency 18 to 26.5 GHz, Power 50 W, Insertion Loss 0.05 to 0.10 dB, Operating Temperature -45 to 85 Degree C, Storage Temperature -55 to 125 Degree C. More details for RFWA42E9F can be seen below.