The 137-125-(L)-2-2 from Narda-ATM is a Flexible Waveguide with Frequency 5.85 to 8.2 GHz, Insertion Loss 0.06 dB/ft, Power 2 kW, Pressure 30 psig, Operating Temperature -55 to 130 Degree C. Tags: Non-Twistable. More details for 137-125-(L)-2-2 can be seen below.