4mm, 21g, Black Open Jump Rings

These 4 mm black open jump rings are perfect for all your crafting needs. They come in a variety of quantities, including 100, 500, or 1,000 pieces, so you can choose the right amount for your project. The rings are made of high-quality materials, ensuring durability and longevity. Their sleek black color adds a touch of elegance to any design.-21g (.7 mm)-4 mm outside diameter-3 mm inside diameter-Iron Alloy Contains small parts. Not intended for children.