The COSTUMAKERS Outerwear Two Way Separating Zipper in Navy, 75 cm (30"), uses #10 silver metal teeth for a robust, smooth front opening that vents from the top or hem. Two sliders provide flexible access when seated or active, and the heavy‑duty chain supports repeated use on coats and performance outerwear. Interface the placket, check alignment carefully, and topstitch evenly for a clean finish.