We have plenty of stock, so please feel free to purchase. Free shipping, and we will ship within 24 hours of payment. If you want to specify a color, please let us know the color and quantity via message after purchase. If we don't hear from you before shipping, we will send the standard color. Material: Polyester, Metal (Stainless Steel Alloy) This is a set of bra extender hooks, convenient for size adjustment. It's more economical than buying a new bra. You can easily adjust the underbust size of your existing bra by simply attaching it. Recommended for those who are concerned about size changes during pregnancy, breastfeeding, or after childbirth when your body shape doesn't return to normal. Easy to adjust. You can increase your underbust size by one size just by attaching it to your bra hook. The underbust size expands, providing a more comfortable fit. It's also convenient when you want to relax at home or when your bra doesn't fit for dance costumes, etc. Notes: Please remove it from the bra when washing.