Features: 30-Hole binding spines, 10pcs/bag. 12mm ring diameter, 9.5mm ring distance, can hold about 85 sheets paper. Cylindrical ring design, easy to turn pages and protect paper. The length of binding spines can be cut. Suitable for 6,9,20,26,30 hole notebook binding. The binding spines can be used for A4, A5, A6, A7, B5 papers binding. Specifications: Material: ABS Color: Black/Light Blue/Light Green/Yellow/Pink/White/Transparent Grey/Transparent Milk Tea/Transparent Green/Transparent Purple(optional) Ring Diameter: 12mm Ring Distance: 9.5mm Sheet Capacity: Can hold 85 sheets of paper Quantity: 10pcs Length(1pc): 28cm / 11.0in Package Size: 29.0 * 7.0 * 2.0cm / 11.4 * 2.8 * 0.8in Package Weight: 100g / 3.5oz Notes: The use of this product may also require a hole puncher, it can punch paper and then bind the paper with these ring. Paper and puncher are not included. Packing List: 10 * Binding Spines