The COSTUMAKERS General Purpose One Way Separating Zipper, Style 1703 in Rail, is a versatile and durable zipper designed for garments requiring a fully openable closure. Measuring 50cm (20"), it uses #2.5 nylon coil teeth for smooth operation and flexibility, making it ideal for bustier and halter top designs. The lightweight construction ensures comfort, while the one-way separating mechanism allows easy garment access and removal. Crafted with color-matched polyester tape and reinforced stitching, this zipper resists fraying and wear, offering consistent performance even with frequent use. Its sleek design and reliable functionality make it a practical choice for both home sewing and professional tailoring projects.Browse additional separating closures in our Open-End Zippers collection, and explore sewing accessories in Notions.