The RFWA28W9F from RF-Lambda is a Waveguide to Coax Adapter with Frequency 26.5 to 40 GHz, Insertion Loss 0.10 to 0.15 dB, Operating Temperature -45 to 85 Degree C, Storage Temperature -55 to 125 Degree C, Weight 16 g. More details for RFWA28W9F can be seen below.