S-Z Standard up to 312F or centrel tube structure up to 144 F;Mettallic, all-dielectric armored or unarmored;Steel wire or FRP for center strength member;The messenger wire can be steel wire or FRP;Go

S-Z stranded (up to 144F) or central tube structure (up to 96F);Air blown fibers (2-12 fibers), outer surface promoting low-friction;Aramid yarns for strength member;Light weight, small size, easy for

S-Z stranded (up to 624F) or central tube structure (up to 144F)Metallic or non-metallic armor providing good crush resistanceSteel wire of FRP for center strength memberGood water penetration, Mechni