Check the listing for details. Premium Quality 12" Black Plastic Coil Binding Supplies, 45mm, 10pcs. Condition: New. Listed at 17.41 USD. This listing is for a box of 10 pieces of 45mm 12" Black Plastic Binding Coil We are pleased to offer a large variety of plastic coil binding supplies (also known as spiral binding supplies) for 4:1 coil binding pitch requirements. All of our coil binding supplies are made of only the highest quality plastics and are manufactured right in the United States of America! In addition, all of our coil binding supplies are compatible with nearly 99.9% of all coil binding machines, including GBC coil binding machines. The 12" coil length is perfect for letter-sized books. Or cut to any length for odd sized binding projects. 4:1 Plastic Coil Binding Diameter Guide Diameter Binding Thickness Sheet Capacity* 6 mm 3/16" 30 7 mm 1/4" 42 8 mm 9/32" 54 9 mm 5/16" 65 10 mm 11/32" 75 11 mm 3/8" 85 12 mm 7/16" 92 13 mm 15/32" 105 14 mm 1/2" 115 16 mm 19/32" 135 18 mm 21/32" 155 20 mm 23/32" 172 22 mm 3/4" 190 25 mm 15/16" 220 28 mm 1" 250 30 mm 1 1/8" 270 32 mm 1 3/16" 280 35 mm 1 5/16" 310 38 mm 1 3/8" 330 40 mm 1 1/2" 350 45 mm 1 9/16" 390 50 mm 1 3/4" 440 * Sheet capacity based on 20lb. bond paper stock without covers. Priority Shipping on all standard color 12" Coil Binding Supplies That's right! All of our standard color 12" coil binding supplies (or spiral binding supplies) are processed and shipped on the same business day 98% of the time! Our dedicated shipping and handling staff works hard to ensure streamlined processing for all of our coil binding supplies. Your coil binding supply order is our top priority. Available in black, clear, forest green, gold, maroon/burgundy, navy blue, red, royal blue, silver, white and yellow. All our coil is MADE IN THE USA, is CPSIA Compliant and is Lead & Phthalate Free.