Amazon.com: Luanxu 4.5 mm Stainless Steel Bead Chain for Blinds & Shades with 5 Connectors, Fix or Replace for Broken Roller Blind Curtain Chain, Great Pulling Force & Rustproof (#10, 3 Meters) :
Vertical Shutter 10M with 10 PCS of Connectors for Roller Blind Bead Chain Cord Roman Venetian