I have installed this zipper on several bench cushions (pictured is one with cushion not yet installed). I like to do double-sided zippers. The instructions aren't the best, but they're easy to install. Leaving one end uncut, thread one side through the zipper and then the other. Close the other end to cut off what you need. If you have problems, there are many YouTube. Tried buying other brands/colors on Prime Day and while they were also marked #3, they were much smaller (some with pills missing). I will stick with it.
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