The RFWA42E0F from RF-Lambda is a Waveguide to Coax Adapter with Frequency 18 to 26.5 GHz, Power 50 W, Insertion Loss 0.08 to 0.15 dB, Operating Temperature -45 to 85 Degree C, Storage Temperature -55 to 125 Degree C. More details for RFWA42E0F can be seen below.