Feature: Made in PVC rubber, each rubber pin back sizes approximately 1/16 inch in diameter. Black in color. These rubber pin backers are great substitutes of metal for butterfly clutch pin backs. These soft rubber pin back provides good grip of pin, keep it stay in place. Our rubber pin back can be used widely in craft projects. These rubber pin backers are a must-have for your uniform, holding badges or name tags. Put the pin in the rubber pin backing, your items will keep pinned securely with no problems. Note: small parts may not suitable for children Specification: Material: PVC Rubber Color: Black Product size: Diameter:11 mm/0.43", Thickness:7 mm/0.28". Quantity:100 Pcs. Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual colorof the item. Thank you Package Includes: 100 Pcs Rubber Pin Backs.