Product Name: D Ring Material: Zinc Alloy Size: 16 mm/ 20 mm/ 25 mm/ 31 mm Color : Silver/Gold/Black Surface Technics: Electroplate durable enough to provide long lasting performance. these D-shaped buckles are made of quality metal material with a sturdy construction, not easy to break or deform . you can attach them to the key chains, and hang them on your backpack, handbag, purse, bracelet, necklace, wallets, anklet, sweater chain, dog collars and more. Package included : 20 pcs /bag Note: 1. Please allow little errors due to manual measurement. 2. Due to the difference between different monitors, the actual of the item may be different slightly from the picture.Thanks for your understanding!