COSTUMAKERS Grey duvet closed-end zipper is a long non-separating zipper for sewing and replacing closures on duvet covers, pillow covers, cushions, and other home décor projects. The 150 cm (59 in) zipper uses a #3 nylon coil and a practical closed-end construction for openings that do not separate at the bottom. Match the colour to the fabric and follow the care instructions for the finished textile item.