Self-Adhesive Polymide Ribbon 4mm Self-Adhesive Polymide Ribbon 4mm for Bracelet polishing. Tough polymide tape is ideal for watch bracelet refinishing. When bracelets have two-tone finishes and they need polishing, you can use this tape to cover the area you do not want to re-finish. Comes in various diameters for all types of bracelet repair. This particular roll has a width of 4mm and an aproximate length of 33 meters.