Porduct name: Nylon coil zipper
Coil zipper—also known as nylon coil zipper—is a type of zipper whose teeth/elements are made from coiled monofilament that was traditionally nylon. The coil is sewn to a zipper tape to make the final product. The final zipper product is completed when the nylon coiled teeth are sewn onto the zipper tape. Nylon coil zippers have a continuous coil chain made from nylon. When this coil is positioned on the back of the zipper and not in the front, this kind of zipper is called invisible zipper.
Stronger horizontal strength is effortlessly achieved with the fabrication of coil zipper. These zippers also have easy repair; zipping and unzipping past the point of misaligned tooth easily repairs the nylon monofilament and the tooth efficiently fixes itself. Another advantage of nylon zippers is its two-way functionality. The sliders can be fixed in either direction of the zipper chain and they will still function smoothly. Coil zippers are the most common type of zippers and are lightweight, heat resistant, and rustproof. Therefore, they last long and work exceptionally well in whatever product they are used.
#3 is a standard coil zipper. Think dress zippers.
Coil is nylon. Tape is polyester.Inherently UV protected.
Coil is 3mm across when closed.
Total width of zipper is just a tad over 1".
Strong enough for small bags or pouches, apparel, pillows, duvet covers, chair pads but flexible and easy to hide.
Pulls can be applied to both ends of the zipper tape so that they will meet in the middle, which is called head to head or double pulls, on bags.