1Excellent PP Material: This book binder spine is made of excellent PP material, which is sturdy and abrasion resistant, not easy to be damaged, and can withstand a lot of use and provide a reliable binding every time. 2Cuttable Design: This PP comb binding spine features a cuttable design, you can easily trim it with scissors to meet your ideal needs. You can add or subtract supplemental paper as you wish. 3Easy To Use: This binder combs spine is easy to use, you just pass it through the holes on top and snap it together, without the need for complicated operating and tools, it is very convenient. 4Good Compatibility: This binder comb has good compatibility, which can be used for 9 hole B5 paper, 6 hole A5 paper, 6 hole A6 paper, 6 hole A7 paper, which is very practical, and can be used to organize all kinds of documents. 5Wide Application: This comb binding ring has a wide range of applications and is perfect for teachers, students, professors and handcraft makers who need to bind reports, presentations and other documents. 50 x Comb Binding Spines