Features PLASTIC MATERIAL: Made of excellent plastic material, reusable and lightweight, with good toughness, wear and aging resistance and long service life. SPECIFICATIONS This plastic binding combs has a 34 hole design with an inner diameter of 12mm and can bind about 85 sheets of paper (for reference). Easy to install: to manually bind, simply punch the corresponding holes in the paper. Suitable for use in office, school or home, practical and practical. Good durability: these binder rings have good surface gloss, strong adhesion, are not easy to break or fade, bind paper easily and can be stored for a long time. 10 pieces in 1 set: includes 10 binding loops, sufficient quantity for easy use and replacement, removable split design, easy to open and close at any time. Specification: Item Type:Binding Spines Inner diameter: approx. 12 mm / 0.47 inches. Number of holes: 34 holes. Binding pages: 12 mm, 85 sheets (for reference) Package list: 10 x spines. Package List 10 x Binding Spines