Features 22mm 30 Holes: Securely bind multiple sheets with the 30-hole loose leaf binding spine, featuring a 22mm inner diameter for ample capacity. 10 Pieces in Set: Receive 10 durable plastic binding rings, ensuring long-term paper storage and use for various projects. Durable PP Material: Crafted from high-quality PP plastic, these binding spines are wear-resistant, rust-resistant, and provide long-lasting durability. Good Performance: Enjoy smooth page-turning and strong adhesion with the glossy of these plastic binding spines, designed for repeated use without breaking. Wide Usage: Ideal for both office staff and students, these binding spines allow for easy manual binding by punching suitable holes, providing versatile paper binding solutions. Specification: Item Type: Loose Leaf Binding Spine Material: Polypropylene Inner Diameter: Approx. 22mm/0.9in Type: Stationery Accessories Binding Consumables Package List: 10 x Loose Leaf Binding Spine Package List 10 x Loose Leaf Binding Spine