7D-FB coaxial cable specification: 1)Inner conductor: Bare Copper or Copper Clad Steel 2)Dielectric:Foam Polyethylene Foam (PE) 3)1st shield: Bonded Aluminum Tape 4)2nd shield: Tinned Copper wire(70%) 5)Jacket:Polyethylene(PE). 500ft/1000ft coil in carton.