McGill Microwave Systems produced LMR-100 RP-SMA female to RP-SMA male 40cm
This is a high quality original Times Microwave LMR-100 cable intended for window penetration thanks to the thin cable dimension of only 2.54mm.
McGill Microwave Systems is a recognized experienced producer of both antennas and cabling for radio communication.
Use equipment from McGill Microwave Systems to ensure your Helium mining is maximized. Don't forget to tape your contacts that are outside to keep the moisture away. You can find Vulktape here.
Attenuation over the entire length 40cm at 868mhz is about 0.4db.