We produce the zippers of the metal, plastic and nylon.*****-toxic , without AZO , environmentally friendly.2.Size/color:#3, #4, #5, #8, various length and tape color at customers request.*****:O/E, C/E, two ways O/E , etc.4.Slider:auto lock, semi-anto lock, non-lock, etc.*****:SGS, ITS, BV, STR,...