The RFWA28E0COAL from RF-Lambda is a Waveguide to Coax Adapter with Frequency 26.5 to 40 GHz, Power 50 W (CW), Insertion Loss 0.2 to 0.3 dB, Operating Temperature -40 to 85 Degree C, Storage Temperature -50 to 105 Degree C. More details for RFWA28E0COAL can be seen below.