Details: Package includes 35PCS Blank Challenge Coins with Acrylic Protective Boxes, the diameter is 4cm/ 1.6 inch; and the thickness is 0.2cm/ 0.08 inch;, sufficient quantity and suitable size for you to DIY or make crafts. Creative DIY Coins: This challenge coins set with compact blank surface is perfect for laser engraving various patterns, words, logos or personalized designs; each coin is came with an individual transparent acrylic protection box to protect the coin better and prevent from loss, scratch, damage or stain. High Quality Material: This set of blank coins is made of solid brass with non electroplated brushed finish, long-lasting, dustproof, rust proof and wear-resistant, not easy to fade, break or deform, can be in the collection for a long time. Versatile & Elegant: Engraving blank coins can be used as collectible coins or commemorative coins for coin collectors, DIY craft lovers, family, friends or colleagues, can also be matched with various hooks, rings, pins, tassels, etc to make beautiful pendants, necklaces, bracelets, earrings, custom key chains, pet ID collars, keepsakes or other decorative items. NOTE: Brass coins are suitable for laser engraving, manual engraving or metal engraving machine, the copper material inside may undergo oxidation, blackening or copper green during engraving, which is a normal phenomenon! Color:Silver Material: Brass Package Contents: 1 set brass coin blanks Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.