Material: ironScope of application: for size 3 or 5 nylon zippers and metal zippers; Used for zipper stop, mainly to prevent the pull head from pulling away from the zipper. Size 3 280Pcs/lot Size 5 Note: 20g a sell, the number is about the quantity, up and down the discrepancy.Notice:1.Due to the light and screen difference, the item's color may be slightly different from the pictures.2.Please allow 1-3cm differences due to manual measurement.3.Thank you for your kindly understanding.