Tinksky 50pcs 7-inch 18cm Durable Nylon Closed End Zips Zippers for Sewing 50 pieces of the nylon zippers in one set will be sold by random color. Material: durable soft nylon and plastic. Each zipper length: about 7-inch 18cm. Great for repairing and sewing crafts, costumes, clothing, etc. Simple and practical design, and easy to use.