3SGYX1 C (Black) Closure: Zipper, 36cm Zipper Size: 3 Color: #580 (Black), 5 pieces YKK's premium zipper "EXCELLA" Unlike other metal zippers, EXCELLA carefully polishes each of the small parts called elements. This polishing process minimizes the unevenness of the entire zipper, resulting in a smooth, sleek feel to the touch and a slider that glides smoothly. 15