Metal spiral binding coils for universities, realtors, marketers and more. Easier to insert into thick book blocks than plastic. Add 1/8-inch to book thickness to select the correct diameter coil - Size: 6mm, Capacity: 30 sheets, Quantity: 100

Metal spiral binding coils for universities, realtors, marketers and more. Easier to insert into thick book blocks than plastic. Add 1/8-inch to book thickness to select the correct diameter coil - Size: 8mm, Capacity: 40 sheets, Quantity: 100

Metal spiral binding coils for universities, realtors, marketers and more. Easier to insert into thick book blocks than plastic. Add 1/8-inch to book thickness to select the correct diameter coil - Size: 10mm, Capacity: 68 sheets, Quantity: 100

Metal spiral binding coils for universities, realtors, marketers and more. Easier to insert into thick book blocks than plastic. Add 1/8-inch to book thickness to select the correct diameter coil - Size: 13mm, Capacity: 90 sheets, Quantity: 100

Metal spiral binding coils for universities, realtors, marketers and more. Easier to insert into thick book blocks than plastic. Add 1/8-inch to book thickness to select the correct diameter coil - Size: 16mm, Capacity: 120 sheets, Quantity: 100

Metal spiral binding coils for universities, realtors, marketers and more. Easier to insert into thick book blocks than plastic. Add 1/8-inch to book thickness to select the correct diameter coil - Size: 20mm, Capacity: 157 sheets, Quantity: 100