4Metal zipper slider: NO.3, NO.5, NO.4, are available. Semi-auto-lock slider. NIckel free products. Metal zipper slider:1, Material: metal, gold brass.2, Style: Semi-auto-lock slider.3, Usage: Suitable for No.3 metal zipper.4, Packing: plastic bag and carton.5, Delivery: 10 days to 25 days, according to your quantity. metal zipper slider