Product include : 5PCS zipper Made of good material and very durable Simple design and easy to use Great for replacing broken zipper Perfect for zipper diy, bag making, clothing, handicrafts, suitcases etc. Material: metal How to install the zipper replacement: 1. Firstly, take off the metal stops on the top of the zipper tape, both side of metal stops should be taken off. 2. Move the slider to the top of the zipper tape, align the zipper teeth. 3. Install the slider into the zipper tape: make the left hand seize both side zipper tape, use your right hand to pull the slider down into the zipper teeth. 4. If you are tough to pull the slider into zipper teeth, you can use some wax or spay some oil to polish the zipper teeth to make it easier.