Features: 1.Wide Range Of Applications: Binding Combs Allowing You To Bind Any Document With Ease, Which Can Achieve 30 Holes Of A4, 26 Holes Of B5, 20 Holes Of A5 2.Stable Construction: Made With Excellent Plastic, Binding Combs Can Withstand Heavy Use And Provide Reliable Binding Every Time. You Can Easily Trim With Scissors To Your Ideal Needs. You Can Add Or Reduce Refilling Paper At Your Will 3.Compatible With Binding Machines: Binding Combs Are A Great Replacement Of Other Brands Spiral Binding Coils, Wire Binding And Binding Combs As Well As 10 Hole Punch, 20 Hole Punch, 30 Hole Punch 4.Perfect For All Your Binding Needs: Binding Combs Are Ideal For Teachers, Students, Professors, And Makers Who Need To Bind Reports, Presentations, And Other Documents 5.Easy To Use: With This Spiral Binding Kit, You Can Quickly And Easily Bind Your Documents Using Binding Coils And Binding Spines, Making Your Work Look Professional Every Time Specification Item Type: Comb Binding Spine Material: Pp Hole Spacing: 9.5Mm / 0.37In Diameter: Approx. 19Mm / 0.75In Number Of Rings: 30 Rings Per Spine Length: Approx. 28Cm / 11-1/4In Compatible Size: A4 Paper 30 Holes, B5 Paper 26 Holes, A5 Paper 20 Holes Cut By Yourself) Maximum Binding Thickness: 150 Sheets Of 70G Paper Use: Loose Leaf Notebooks, Diaries, Quiet Books, Desktop Calendars, Etc.