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.