50 feet 2.4mm White Vertical Blind Track Cord — String Replacement

Professional Grade white cord with fiberglass core used on a lot of vertical blinds and draperies. The best way to figure out how much you would need just double the width of the window and the length and then divide by 36 to get the yardage. Round up to the nearest yard. Also used for other projects where a strong, diamond braided, non-stretch cord that resists deterioration in sunlight is needed.