The 187-125-(L)-6-6 from Narda-ATM is a Flexible Waveguide with Frequency 3.95 to 5.85 GHz, Insertion Loss 0.05 dB/ft, Power 3 kW, Pressure 30 psig, Operating Temperature -55 to 130 Degree C. Tags: Non-Twistable. More details for 187-125-(L)-6-6 can be seen below.