1. The zipper's straight through and flatness: make the zipper in the natural sagging state, no wave back bending.
2. Zipper Chain teeth: injection molding zipper even teeth bright, the middle of the front no hollow, no teeth, metal zipper chain teeth arranged neatly, not skew, no broken tooth chain, teeth of good compatibility.
3. Injection Zipper Color: uniform color, bright bright, colorless difference.
4. Zipper Belt Sticker: Zipper Belt sticker position symmetry, no skew, glue place repeated 10 times turning 180 degrees and constantly.
5. Pull head: Plating of the coating of the bright, not to start the skin, no matter scratches, coating thickness is not less than 3UM, paint, spray the head of the surface of the bright color coating evenly solid, no bubble, no dead corners and other defects.
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