YOU NEED A 3/4" HOLE IN THE M/M FOR THIS H/D STUD WITH EXTRA HEAVY DUTY STUD MOUNT 3/8" X 24 FOR CB ANTENNA SPECIAL TRIM COAX TO CB CH 19 ( 9 FT RG-8X BLACK COAX USING TEFLON PL-259 ) WE USE A METER TO TRIM THE COAX FOR 50 OHM AT CH 19 ======================================================== IF YOU WANT THE 18 FT COAX TRIM TO CH 19 AT 50 OHM LET ME KNOW THERE ARE $4.00 EXTRA THANKS FOR LOOKING COLBY |