Teeth Material: Brass Tape material: Polyester Teeth color: Black Bronze Size: #5 Zipper Type: Open end, auto lock Common uses: Leather jackets, motorcycle jackets, sweatshirts, hoodies, coats, everyday jackets, bomber jackets Description: #5 brass zippers are made of medium-weight metal and feature teeth that measure approximately 5mm (1/4 inch) wide when zipped. Zippers separate at the bottom, jacket-style. These are one-way zippers (they have one slider).