Plastic Double Piping Cord Plastic double piping cord also known as blind seam profile. available in the following sizes: 5mm, 200 metres per roll. 7mm, 150 metres per roll. Category: Piping Cord Related products Smooth Piping Cord View product Martins [white] Piping Cord View product Cotton Piping Cord [pre shrunk] View product Plastic Piping Cord View product