Each zipper has an overall length of 6 3/4" (17cm) with an actual zipper length of 6"(15cm). These are nylon coil zippers with plastic teeth and a locking metal slider. The retainer box and insertion pin (bottom "separating" components) are plastic.
For a large selection of YKK zippers please visit my shop- http://www.zipit.etsy.com
**YKK is a registered trademark of YKK Corporation.