These zinc and copper sheets are designed for educational use, including classroom teaching, student learning, and science demonstrations. They support hands-on experiments such as building fruit batteries to explore basic principles of physics and chemistry. Features: - Color: Assorted - Material: Copper, Zinc - Zinc strip size: 4.00 × 0.90 × 0.08 cm (1.57 × 0.35 × 0.03 in) - Copper strip size: 4.00 × 0.90 × 0.22 cm (1.57 × 0.35 × 0.09 in) - Educational application: Ideal for DIY fruit battery projects in teaching, learning, and presentations - Learning support: Helps engage students in fundamental concepts of electricity, electrochemistry, and energy conversion - Family science activity: Enables parents and children to conduct simple, safe, and instructive experiments together - User-friendly design: Easy to handle and integrate into classroom or home-based science activities - Durable construction: Made from high-quality copper and zinc for reliable performance and resistance to bending or breakage Package includes: - 20 copper sheets - 20 zinc sheets