... different molds. different weight slider Metal slider , zipper puller & zipper head & auto lock slider, metal zipper slider & zip pull , zip puller ,zip head ... sizes: #3, #5, #7,#8, #10 sliders for nylon zipper,derlin zipper, metal zipper,2, different colors: black, bule, green, purple, yellow etc ... , more information pls connect with me. Metal slider for metal zipper and nylon ...