Spiral Plastic Coil 4:1 12" [Dark Blue, 12 mm (1/2")] 100 /Box

Discover the versatility and durability of spiral binding plastic coils, a timeless choice for your binding needs. Our spiral coils are crafted from resilient and flexible plastic, providing a contemporary alternative to traditional plastic comb spines, all while maintaining affordability and user-friendly functionality.

One key advantage of spiral binding coils is their unique ability to allow books to flip pages a full 360 degrees without causing damage. This feature ensures that your bound materials can lay flat, promoting easy readability. The coils effortlessly bounce back to their original shape, maintaining resilience even with frequent use and bending.

Not just durable, our plastic coils are designed for hygiene convenience. The material can be easily sanitized between users, offering a practical solution for maintaining cleanliness and preventing the spread of illnesses like COVID-19. Pair them with laminated or fully encapsulated contents for an added layer of protection.

Ready to experience the durability and convenience of spiral binding plastic coils? Explore our extensive selection of color options at Spiral today. Benefit from fast shipping to your home or office with our in-stock coil binders. For those with specific preferences, we offer custom cut lengths and special order colors.

Unsure about the right size for your needs? Consult our comprehensive guide below for assistance in selecting the perfect coils. If you still have questions, feel free to contact us for personalized support. Elevate your binding experience with Spiral!

What Kind of Coils Do I Need to Buy?

We offer a huge selection of spiral binding coils for you to choose from, most stocked in all our nation-wide USA warehouses for fast shipment and delivery. There are four different categories of coil to choose from, including the length of the coil, the pitch, the diameter (or coil size), and the color. Here are the steps to follow for how to choose the binding coils you need to buy.

1) Choose a Coil Length

First, choose your coil length. 12" coils are made for letter size pages and are the most popular choice. 36" length are a bit more specialty, primarily used by print shops are those wanting to make multiple books from one single coil spine. 36 inch length coils are also great for oversize and jumbo books.

Need a different length? You can easily cut down the above stocked coil lengths to the size you need, but sometimes that is not the most efficient option for larger quantities. If you need 100 or more coils of a specific length, consider custom cut coils instead. And remember to order 1" longer than your document length so you have that extra 1/2" on each end that allows for cutting/crimping in and finishing the bind.

2) Choose a Coil Pitch

Once you have chosen the length of your coil bind spine, choose your pitch. What is a binding pitch? Pitch refers to the holes per inch, or the hole spacing. They are reflected in a ratio that includes the number of holes, a colon punctuation, and then the inch measurement...for example, 4:1 is pronounced “four to one” and means that there are 4 holes for every 1 inch and 5:1 means there are 5 holes for every 1 inch.

4:1 pitch binding coil spines are by far the most popular, as it is the standard spacing for coils in the United States. About 98% of our customers order 4:1 pitch spiral bindings. The 5:1 is a specialty spacing that is manufactured primarily for print shops that have specialty equipment for punching the pattern, and users who may have machines manufactured in other countries where the 5:1 spacing is more common. You will want to check your spiral binding machine for compatibility before you buy spiral binders online.

3) Choose a Coil Size / Diameter

Now choose your coil size (diameter) for your document. You can use the coil bind capacity chart below to help choose the best size based on your stack thickness or your sheet capacity. Just note that the sheet capacity was calculated using sheets (not pages) that were all 20 lb. bond copy paper, without any covers; this means it can vary significantly depending on the stock you are using, which is why we recommend the stack thickness method instead. And remember: having a coil that is slightly too large is better than having a coil that is too small; a small coil won't allow pages to flip smoothly and can pinch them, tear more easily. So if you are between sizes, we recommend you size-up.

There is also a general rule with three simple steps to get the proper fit for spiral binding that works as well:

1. Take the pages and covers being bound and lay the stack flat on a table.

2. Measure the thickness of the stack, but don’t press down; let it lay naturally loose.

3. Add 1/8" to the stack thickness - that will be the size of the binding coil recommended for your document thickness.

4) Choose a Coil Color

Lastly, choose your coil binding comb color. Stocked colors for most sizes and pitches include black, white, clear, royal blue, navy blue, red, and silver. The colors are solid, not coated, so even with heavy use and scratching, they will remain. Black coils are the most popular choice, while white and clear are close behind. Maroon and navy blue are popular choices for professional institutions, as they often match corporate branding. Red and royal blue are brighter and more vibrant than the others, so are more common for schools and other organizations where brighter colored coil bindings are needed.

If you have any questions, or are still not sure what kind of coil to buy, please call us at (866) 537-2244 for help.

* The sheet capacity rating above was calculated using all 20 lb. bond paper, with no covers and no other paper stocks. The actual sheet capacity will vary depending on what paper stock and covers you are using. For this reason, we recommend you use the stack capacity for a more accurate fit. All of these capacities are approximations. If you are between sizes, we recommend you size-up to allow for easier page-turning.