Upgrade your build with a COSTUMAKERS 50 cm (20 in) one-way separating zipper in black. Featuring #10 silver metal teeth on reinforced polyester tape, this heavy weight closure glides smoothly, resists corrosion and repeated washing, and installs easily thanks to precision‑cut tape that keeps width consistent. Ideal for coats & heavy jackets, every production run is tensile‑tested and slider‑fatigue inspected so your finished pieces deliver long‑term reliability and a polished look. From boutique projects to full‑scale manufacturing, trust COSTUMAKERS for colour accuracy, tight tolerances and season‑after‑season performance.