Multi-tube loose tube design, 4 tubes with 12 fibers each, corrugated steel tape "Lite Armor" with single polyethylene outer jacket, fiber strand: G.657A1 NOVA glass, attenuation: .034 dB/km at 1310nm, .20 dB/km at 1550nm, fill: Thixotropic jelly in the loose tube to prevent water ingress