300 feet 1.8mm White Window Blind Cord, String - Horizontal Blinds & Roman Shades Color: White ---- Diameter 1.8mm ---- Replacement Cord Search using NCMORIN STRING in Amazon search for my other string colors This diameter cord is mostly used on Horizontal Blinds & Roman Shades Polyester cord - resists effects of sunlight better than most other cords. Wound on a spool to eliminate tangling