Unique Bargains Plastic 20 Sheet Capacity 21 Ring Binding Spines for Notebook 200 Pcs 1/4" Black

These spiral binding coils are made of high-strength plastic, ensuring long-term, efficient operation for all your binding projects, making it easy to bind documents and preserve them for extended periods. Binding spirals provide a 360-degree page-turning rotation capability for easier reading.Suitable for various office settings, providing great convenience for document storage, binding, and paper collection. They are a portable office and study accessory. Instruction: These binding comb spines are designed in 21 rings, making them suitable for any 21-hole rubber ring binding machine. Binding spirals provide a 360-degree page-turning rotation capability for easier reading. Note: These binding comb spines are suitable for binding machines.