I0QM Balun, made with good quality RG cable.
Perfectly cut for band frequency with good SWR response.
Used in all serious antennas on 6m and 4m where perfect symmetry and out of band noises rejection is demanded.
Ended with N female connector, silver or nickel coated, gold or silvered inner pin, PTFE insulated.
Antenna side - M4 solder lugs secured with Andrew tape.
N connector Box is sealed with epoxy resin, 100% waterproof, will survive a bomb probably.
For more details see post
Price on e-mail.