Enhance your document organization and presentation with our high-quality Single Loop Wire Binding Spines, designed to provide a secure and professional binding solution. Crafted from durable iron material, these binding coils feature a 12.7mm (1/2 inch) diameter capable of holding up to 90 sheets of A4 paper (70g), making them ideal for a variety of office, school, and business binding needs. Key Features: · **90 Sheet Capacity:** With a 12.7mm diameter, these spiral binding coils securely hold up to 90 standard A4 sheets, allowing for easy addition or removal of pages as needed. · **4:1 Pitch with 48 Teeth:** Engineered with a precise 4:1 pitch and 48 teeth, these coils are fully compatible with all standard binding machines that punch 4 holes per inch, ensuring smooth and efficient binding every time. · **Convenient Pack Size:** Each box includes 100 spiral binding coils, providing ample supply to support continuous binding projects, enhancing productivity and minimizing interruptions. · **360-Degree Page Rotation:** The flexible spiral design allows documents to rotate fully, providing effortless 360-degree page flipping and enabling bound materials to lay flat for easy reading and note-taking. · **Ideal for Letter-Size Paper:** Perfectly sized for letter-sized sheets (8.5 x 11 inches), these coils can be easily trimmed with scissors to meet specific project requirements, offering versatility for various binding tasks. Specifications: · Material: Iron · Binding Diameter: 12.7mm (1/2 inch) · Binding Capacity: Up to 90 sheets (A4, 70g) · Number of Teeth: 48 teeth · Pitch: 4:1 Package Includes: · 100 x Single Loop Wire Binding Spines This set of Single Loop Wire Binding Spines delivers reliable performance and durability for all your binding needs, whether it’s for engineering documents, business reports, office paperwork, or university presentations. Experience a neat, professional finish and enhanced usability with these versatile and easy-to-use binding coils.