Features: Crafted from plastic, these discbound expansion discs offer sturdy and flexible binding solution for notebooks and planners. Featuring snapping on designs, these discbound binding rings allow effortlessly page insertion, removal, and rearrangement to organize content seamlessly. Suitable for students, teacher, office workers, business professional, and creative enthusiasts seeks efficient organization tool for journals, scrapbooks, or project documentation. Enhancing handmade notebooks, jopurnal, planner, or crafting project with these pack of 50pcs book binding discs round discbound bidning rings. The black finish complements any planner while ensuring long time durability with scratch resistant, warp proof construction. Specifications: Component: Plastic Color: Black Size 1: Approx. 19mm/0.75in Size 2: Approx. 28mm/1.10in Size 3: Approx. 35mm/1.38in Weight: Approx. 40g-50g Package Includes: 50Pieces Book Binding Discs note: 1.Please allow 0-1cm error due to manual measurement. Be sure you donot mind before bid. 2.Due to difference between different monitors, the picture may not reflect the actual color