1、Specification: This binding spine features 30 rings design, with a diameter of 19mm, hole spacing of 9.5mm, single length of 28cm, and maximum binding capacity of 150 sheets of 70g paper. 2、Compatible Size: This comb binding spine helps you easily bind various papers, supports A4 paper 30 holes, B5 paper 26 holes, and A5 paper 20 holes, you can cut the binding spine according to your needs. 3、Plastic Material: This binding comb is made of excellent plastic material, which has strong toughness, wear resistance, aging resistance, and can withstand long term wear and use, providing reliable binding. 4、Applicable Scenario: This kit includes 10 pieces comb binding spines, suitable for binding loose leaf notebooks, handbooks, calendars, reports, presentations, and other documents, with strong practicality. 5、Convenient to Use: These plastic binding combs make it easy for you to bind paper and documents, with open design that allows you to easily add or reduce paper, meeting your more binding needs.