Package and Transportation Content: you will receive 20 pieces of threaded edged blank coins for engraving, Individually packaged acrylic box protect brass challenge coin from oxidation and damage.All coins are packaged in an plastic box, which is easy for transportation. Coin size and material: These metal billets used for carving have a diameter of approximately 40 millimeters/1.57 inches and a thickness of approximately 2.2 millimeters/0.0867 inches. Pure brass coin, without coating. Heart Warming Gift:these blank coins can be engraved into a variety of patterns to friends, family, girlfriend, boyfriend, colleague, coworker, neighbor, classmate, father, groom, friend as meaningful gifts. DIY Fun: the surface of these metal tags is blank, which is perfect for DIY enthusiasts; you can make some designs on blank coins, such as various patterns and words; laser-engraving blanks can also be matched with various hooks, rings, to make beautiful badge, charms, pendant, dangles, necklaces, custom key chain like pet ID tags, keepsakes. Aluminum silver-plated coins are suitable for manual engraving, metal engraving machine engraving, starting power of 10W-20W can leave traces on the metal coins. Colour:Gold Material:brass Size:40mm Package Contents: 20 x Blank Challenge Coin