Brand New Backs Butterfly Clutch Holder Replacement for Lapel Brooch Jewelry Tie Tack Citation Bars Specifications: Material: PVC rubber. Size：Diameter is approx.10.6 mm ,height approx.7.6 mm. Quantity: 100pcs Color:Green They work great for attaching beads, dangles and jewellery findings to create a personalized ornaments these pin keepers are easy to put on and take off without a tool; Simply push to secure onto pin post; These locking pin backs are very smooth and prevent the skin from getting stuck injury. Warning: Products contain small parts, please do not let children play to prevent inadvertent swallowed.