Material: High quality aluminum alloy Surface treatment: Oxidation treatment Color: Black, green, orange Length and width: 75.5mm * 22.5mm Cylinder thickness: 1.18mm Net weight: 18g Function: Waterproof; can store pills, capsules, oral liquid, alcohol cotton balls, matches, and other small emergency items Specifications: 1. High precision waterproof design, quality assurance; suitable for daily use, outdoor activities, and travel 2. Lightweight and portable design; net weight is 18g, can be easily attached to a keychain without added burden 3. Oxidation treated surface for enhanced wear resistance, prevents rust, environmentally safe; ideal for storing pills and capsules 4. Thoughtfully designed interior space to accommodate a standard glass bottle of oral liquid 5. Made from high-quality aluminum alloy with high hardness; durable, waterproof, and resistant to breakage; ensures long-lasting product performance Package Included: 1 * Waterproof Capsule