The RFWA28W0COBS from RF-Lambda is a Waveguide to Coax Adapter with Frequency 26.5 to 40 GHz, Insertion Loss 0.8 to 0.55 dB, Operating Temperature -40 to 85 Degree C, Storage Temperature -50 to 125 Degree C. More details for RFWA28W0COBS can be seen below.