Give your projects a professional, durable closure with the COSTUMAKERS 50 cm (20 in) Outerwear one‑way separating zipper in Black. Built with #5 antique brass metal teeth and reinforced polyester tape, it glides smoothly without snagging and resists corrosion, UV fading, chlorine, and machine‑wash heat. The design prevents unwanted separation while the easy‑grip pull saves time at the start line or in the change room. Perfect for heavy coats, parkas, leather jackets, motorcycle gear, and outdoor equipment. Makers, tailors, and production houses trust COSTUMAKERS for tight length tolerances, consistent colour dye‑lots, and rigorous five‑cycle stress testing. Use it to replace worn closures, finish your latest sewing pattern, or add a colour‑pop accent. Even after hundreds of washes, this zipper maintains its vibrant shade and dependable hold so you can move with confidence. From at‑home repairs to large‑scale production runs, this staple notion helps you craft garments and accessories that outlast trends and perform season after season.