Piping Cord ~ 3/8" Piping Cord -1/8" Filler Cord BLACK (10 Yards / Pack) Piping Cord ~ 3/8" Piping Cord -1/8" Filler Cord Black (10 Yards / Pack) Piping Cord is 100% washable and is great for use as an edging or for seam accents on home decor and apparel projects. Easy care, colorfast, and needs no ironing. 50% polyester/ 50% cotton. 1/2" wide. 3/8" Fabric with 1/8" Filler cord Poly-cotton blend with Polyester-filler cord