The Laird MBD vehicle roof mount antenna installation hardware kit is for Motorola-style mobile antennas up to 1000 MHz. This NMO mount is a brass permanent mount for a 3/4 inch hole. The Laird Technologies mobile antenna mount includes 17 feet of Teflex cable. Order standard RG58 size connectors separately. Thread size is 1 1/8 inch - 18.