Made of high-quality brass. Nickel-free. "Nickel-free" means the material is made without nickel, which can cause metal allergies. Brass is far more resistant to rust than iron, making the product last longer. Gold color. *Measured by weight in grams. Quantity may vary. *This product is imported. (Due to the reasonable price, there may be some scratches, rust, discoloration, chips, or burrs.) We inspect the items, but please understand that there may be some imperfections when purchasing. #HanageNeko #handmade #materials #supplies #earrings #hooks #gold #golden #parts #brass