YKK Vislon #10 zippers are engineered for those who need strong, reliable performance in demanding outdoor settings--ideal for boat covers, convertible tops, heavy-duty jackets, or weatherproof enclosures. This 36-inch black separating zipper features molded plastic teeth, offering a smooth, corrosion-resistant zip that easily stands up to saltwater, sun, and repeated use. The auto-lock double pull slider lets you open from either end and automatically prevents accidental unzipping, while the durable polyacetal construction ensures both strength and flexibility without the risk of metal zipper corrosion. Dependable in marine and outdoor gear applications, it's a solid, sensible upgrade for projects where quality and toughness matter.