【4:1 Pitch & 48 Loops】Spiral Binding Coils (48 loops) are designed with a 4:1 pitch, fit any 4-holes-per-inch coil-binding machine, and letter paper is 8.5 x 11.0 inches. It helps to combine the report pages, calendars, documents, and more, providing much convenience to daily work or study. Their 4:1 pitch matches the 4-holes-per-inch punching pattern on the side of your book. 【Reliable to Use】Made of quality plastic for increased durability and holding strength. coil-bound spines are sturdy, long-lasting, and allow you to easily compile paper and store it for a long time. Plastic wire binding spines allow 360-degree page-turning rotation capability for easier reading, bound projects can lay flat, and add or reduce paper easily, convenient for you to use. 【Multiple Sizes Choices】There are 8 diverse sizes, namely 1/4", 5/16", 3/8", 1/2", 9/16”,5/8", 3/4" and 7/8”, Ideal for office documents, engineer papers, business projects, presentations, and more, versatile and practical. Besides, our coils have plenty of excesses, you can crimp the ends for a finished look. 【Value Pack】The package contains 120 pieces of spiral binding coils in 8 different sizes, 15 pieces per size, rich quantity and size will meet your daily binding projects' use needs. You can also share with your friends. Fit for most wire binding machines, such as GBC, Trubind, and Fellows binding machines. 【Keep Organized】Our spiral ring binder will provide a permanent solution, securely holding pages together, help you organize messy documents, keep them organized and orderly, and make your desk keep tidy. Meanwhile, it can match and beautify most documents or pages, fit a letter-sized book and binding project perfectly, ideal accessory for offices.

Features: 

Practical tools: With plastic spiral coil, you can add papers as you need and put your files in order and neatly, no worry about losing any important sheet and easy to change papers, bringing your life much convenience. 

Glad to share: You can share binding spines with your family, friends, coworkers, teachers or others who need them, they will be so glad to get these practical tools, to promote your relationship. 

Specifications: 

Material: plastic 

Color: As shown 

Size: 1/4 5/16 3/8 1/2 9/16 5/8 3/4 7/8 

Package includes: 120 x Plastic spiral binding coils 

Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays.