“The mini coax is neither RG-188 nor RG-174. It is actually 1.5D-QEFV Japanese coax. Comet states it is ‘RG-174 type’ coax because they have similar loss and diameter specifications. Initially RG-188 was used in comparison but was changed to the RG-174 comparison because they are more similar. The balance of the coax is Japanese 3.5D-QEFV. There is no ‘RG’ equivalent to 3.5D-QEFV. RG-58 connectors will not fit the 3.5D-QEFV coax, the Comet coax has a larger outside diameter and a larger central core and has about 30 percent less loss than RG-58. All of the coax cables produced by Comet use the Comet (Japanese) low loss coax. Mick Stwertnik – NCG Company”
These CK-3NMO deluxe mobile mount cable assemblies from Comet feature 16.75′ total of coax cable of which the first 18 inches is RG-174 for easy entry through your vehicle weather seal.
They also feature a Teflon® insulator and a 24K gold-plated PL-259 center pin. These assemblies also include a detachable barrel for ease of routing, if needed. The PL-259 connector has a removable barrel to route it through smaller holes and tight spaces.