NanBo Eco-friendly Book Binding Material Plastic spiral coil binding
Plastic spiral coil binding's specification:
| Coil Diameter | Wire Thickness | Recommended Max Book Thickness(mm) | Coil Pitch |
| 1/4"(6.4mm) | 1.3mm | 3.4 | 3:1,4:1&6mm,8mm |
| 5/16"(7.9mm) | 1.3mm | 4.9 | 3:1,4:1&6mm,8mm |
| 3/8"(9.5mm) | 1.6mm | 6.5 | 3:1,4:1&6mm,8mm |
| 7/16"(11.1mm) | 1.6mm | 8.1 | 3:1,4:1&6mm,8mm |
| 1/2"(12.7mm) | 1.8mm | 9.7 | 3:1,4:1&6mm,8mm |
| 9/16"(14.3mm) | 1.8mm | 11.3 | 3:1,4:1&6mm,8mm |
| 5/8"(15.9mm) | 1.9mm | 15.9 | 3:1,4:1&6mm,8mm |
| 3/4"(19.1mm) | 1.9mm | 19.1 | 3:1,4:1&6mm,8mm |
| 7/8"(22.2mm) | 2.2mm | 18.2 | 3:1,4:1&6mm,8mm |
| 1"(25.4mm) | 2.2mm | 20.4 | 3:1,4:1&6mm,8mm |
| 1-1/8"(28.6mm) | 2.3mm | 23.6 | 3:1,4:1&6mm,8mm |
| 1-1/4"(31.8mm) | 2.3mm | 26.8 | 3:1,4:1&6mm,8mm |
| 1-3/8"(34.9mm) | 2.5mm | 29.1 | 3:1,4:1&6mm,8mm |
| 1-1/2"(38.1mm) | 2.5mm | 32.1 | 3:1,4:1&6mm,8mm |
| 1-3/4"(44.5mm) | 2.5mm | 38 | 3:1,4:1&6mm,8mm |
| 2"(50.8mm) | 2.5mm | 42.8 | 3:1,4:1&6mm,8mm |
