Material:Metal Metal type:Metal Item type name:Pin Creative Design to Express Emotions: You will receive 4 social battery pins (2 black, 2 white) with seven unique expressions. You can express your current mood by sliding the lightning bolt pattern. These fun brooches are the perfect communication tool when you don't want to speak, and are suitable for both adults and children. Comfortable and Safe Wearing Experience: Measuring 2x0.28 inches (51x21 cm), these lightweight social battery slider pins are designed for comfortable wear. The specially treated back prevents them from snagging on clothing or backpacks, making this backpack brooch both practical and secure. Premium and Durable Material: These adorable my social battery slider pins are made from a durable alloy with a smooth, enamel-finished surface that resists scratches, fading, and rust, ensuring long-lasting durability without deformation or discoloration. Versatile Fashion Accessory: These my social battery pins are perfect for various parties and work occasions, easily matching backpacks, jackets, hats, scarves, shirts, and more to showcase your personal style, while also serving as a bag brooch and hat pin. Ideal gift choice for any occasion: Whether it's Christmas, Valentine's Day, anniversaries, back-to-school season, or Thanksgiving, these exquisite pins for backpacks are the perfect gift for children, friends, and family, helping you easily express your feelings and gratitude.