Meet your binding needs: This software package provides a total of 240 plastic spiral combination coils in 6 different sizes, each with 40 coils. This sufficient quantity is very suitable for your daily binding requirements and is compatible with most wire binding machines. And each size of the coil is individually placed in a bag labeled with its size. Durable and reliable: Our bonding coils are made of high-quality plastic, ensuring durability and long-lasting use. These coils provide a convenient solution for safely compiling and storing your documents over a long period of time. Simply lay them flat, rotate them 360 degrees, and easily add or remove pages. 4: Versatile Pitch: These spiral spines have a 4:1 pitch, designed to accommodate letter sized paper (8.5 x 11.0 inches). This means they are compatible with any binding machine with 4 holes per inch. Whether it's report pages, calendars, documents, or more, our coils provide convenience for your daily work or study. Multiple sizes available: Our plastic spiral combination coils come in 6 different sizes, including 1/4inch, 5/16inch, 3/8inch, 1/2inch, 1/2inch, 5/8inch, and 3/4inch. You can choose the perfect size to enhance the appearance of various documents and pages, making it very suitable for work. Keep documents organized: These adhesive coils are an excellent solution for keeping documents organized. They help maintain order and cleanliness, making your workspace more efficient. Whether it's office files, engineering files, business projects, presentations, etc., these coils are universal and practical tools. Colour:black Material:plastic Package Contents: 240 x binding combs Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.