SULLIVANS: Make-A-Zipper Kit Invisible. Make your own zipper that fits into your exact length requirements! It is easy: just measure your zipper length starting with the zipper pull then bar tac with a zigzag machine at the finished length. This package contains a 4-1/2 yard roll of Make-A-Zipper and twelve zipper pulls. Available in a variety of colors, each sold separately. Imported.