LYNN D-LU2LU2-SR2-070M (Millennium part 541877) is a 70 m duplex singlemode jumper on slim 2.0 mm cordage, terminated LC/UPC to LC/UPC for direct connection to duplex SFP and SFP+ optics. The reduced-diameter cable eases congestion in vertical managers and high-density racks where standard 3.0 mm duplex quickly fills the pathway. Seventy meters covers floor-to-floor and room-to-room runs that exceed patch-cord length but do not justify a spliced backbone. Factory-polished UPC ferrules arrive tested for insertion and return loss, giving engineers a known-good link for inside-plant and data center cross-connects.