Hypoallergenic & Safe Material: Crafted with premium white copper alloy, these nickel-free charms are safe for sensitive skin. Passed ASTM F2923 jewelry safety standard Universal Charm Bracelet Fit：3.2mm connector works with most charm systems. Easily attaches to bracelets, necklaces, or keychains (chain not included) Exquisite Butterfly Detailing: Features double-sided laser etching capturing authentic wing textures. Each charm showcases unique flight angles with smooth, snag-free edges. Tarnish-Resistant Coating: Advanced PVD plating maintains shine 3x longer than standard charms. Perfect for daily wear jewelry Gift-Ready Presentation: Each charm arrives in anti-tarnish velvet pouch with care guide. Bulk options available for craft businesses ✨ Single Charm Excellence ✨ Every piece undergoes 18-step quality checks to ensure museum-level craftsmanship. The articulated wing design allows dynamic movement when worn. 🔍 Design Specifications 🔍 - Single charm purchase (chain sold separately) - Surface Area: 150mm² 3D detailing - Edge Smoothness: <0.01mm roughness - Compatible with 2-4mm chains