SpecificationsHRCAY-50-9(flexible 1/2") RF cable Inner conductor: Copper-Clad Aluminum wire or Copper 3.55mm Dielectric: Physical Foam Polyethylene 8.7mm Outer conductor: Helical Copper Tube 12.0mm Jacket" Black PE or Low Smock Halogen-Free-Fire-retardant 13.4mmHRCAY-50-7(flexible 3/8") RF cable Inner conductor: Copper-Clad Aluminum wire or Copper 2.6mm Dielectric: Physical Foam Polyethylene6.7mm Outer conductor: Helical Copper Tube 9.1mm Jacket" Black PE or Low Smock Halogen-Free-Fire-retardant 10.20mmHRCAY-50-5(flexible 1/4") RF cable Inner conductor: Copper-Clad Aluminum wire or Copper1.9mm Dielectric: Physical Foam Polyethylene 4.7mm Outer conductor: Helical Copper Tube 6.35mm Jacket" Black PE or Low Smock Halogen-Free-Fire-retardant 7.50mm