Description: brand new and high quality Features: High quality, durable and undeforming material is not easy to be broken. Helpful and practical tools can make your loose leaves organized. Suitable for school, office and home, note cards, loose leaves, etc. Great for fastening any size document stack and keys and swatches too. Rings open and close easily and lock for extra security. Pull to open and squeeze to close. Specifications: Material: Nicked Plated Metal Color: Silver Model: 25#, 30#, 35#, 40#, 45#, 50# Diameter: 25#: Inner: 20mm/0.79in, Outer: 25mm/0.98in 30#: Inner: 25mm/0.98in, Outer: 30mm/1.18in 35#: Inner: 30mm/1.18in, Outer: 35mm/1.38in 40#: Inner: 35mm/1.38in, Outer: 40mm/1.57in 45#: Inner: 39mm/1.54in, Outer: 45mm/1.77in 50#: Inner: 43mm/1.69in, Outer: 50mm/1.97in Quantity: 10Pcs/1 Set Note: No retail package. Transition: 1cm=10mm=0.39inch Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Binder rings only, other accessories in the pictures are not included. Package includes: 10 x Metal Binder Ring