Features: Discover the versatilities of our 10Pcs Blank Challenge Coin, crafts from quality iron with a golden/silver plating, great for personalizing engraving projects. Each coin boasts a 40mm diameter and comes with a clear storage box, ensuring durability and resistance to rusts and corrosions for long preservations. Great for businesses look to recognize employees, schools and organizations rewarding achievements, or individuals seek unique DIY craft opportunities. Great for award ceremonies, anniversaries, or any formal event where a customizable touch is appreciated. Elevates your creative projects with these engraving blank coin, offering endlessly possibilities for creating bespokes commemorative items. Specifications: Component: Iron Diameter:approx.40mm/1.57in Thickness:approx.3mm Option Color: Gold, Silver Quantity: 1 Set Package Includes: 10pcs Blank Coin 10pcs Clear Protective Case note: Please allow 0-1cm error due to manual measurement. please make sure you not mind befores you bid. Due to difference between different monitors, the picture may not reflect the actual color the item.