The 51-125-(L)-6-6 from Narda-ATM is a Flexible Waveguide with Frequency 15 to 22 GHz, Insertion Loss 0.35 dB/ft, Power 0.2 kW, Pressure 45 psig, Operating Temperature -55 to 130 Degree C. Tags: Non-Twistable. More details for 51-125-(L)-6-6 can be seen below.