Amazon.com: Darice Black Elastic Cord, 2mm Thick, 72 Yard Roll – Perfect for Jewelry Making, Easy to Cut to Size, Black Rubber Covered with Black Polyester – Craft Cord for Beading, Hair
Amazon.com: Zealor 100 Yards 2 mm Elastic Cord Stretch String Elastic Beading Cord Craft Thread for Jewelry Making (Black)
Amazon.com: 2 Pack 2 mm 5/64 Inch Elastic Cord Stretch String, SourceTon Elastic Beading Cord (Black & White, 55 Yard), Great for Crafts, Hair Ties and Home Uses