Welcome to the store! 1. SPECIFICATIONS: This plastic binding spine is a 34-hole design with an inner diameter of 12mm, which can bind about 85 sheets of paper (for reference). 2. PLASTIC MATERIAL: Made of excellent plastic material, reusable and lightweight, which has good toughness, wear resistance, and aging resistance, and a long service life. 3. GOOD DURABILITY: These binding rings have good surface gloss, strong adhesion, are not easy to break or fade, easily bind paper, and are stored for a long time. 4. EASY TO INSTALL: Just punch the appropriate holes in the paper for manual binding, suitable for office, school, or home use, convenient and practical. 5. 10 PCS IN 1 SET: Includes 10 pcs binding loops, sufficient quantity for easy use and replacement, detachable split design, easy to open and close at any time. Item Type: Binding Spine Inner Diameter: Approx. 12 mm / 0.47 in Number of Holes: 34 Holes Binding Pages: 12mm 85 Sheets (For Reference) 10 x Binding Spines Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution!