12 pcs ID 4.2/6.2mm Arrow Shaft Archery Aluminum Nock Pin for Compound/Recurve Bow/Longbow Archery accessory

12pcs ID 4.2/6.2mm Arrow Shaft Archery Aluminum Nock Pin for Compound/Recurve Bow/Longbow Archery accessory 1)Material: Aluminum 2)For arrow shaft ID 4.2mm/6.2mm 3)Could be inserted to the arrow shaft and nock 4)Quantity:12pcs aluminium pin, not including the nocks.