KW-trio 12pcs DIY Disc Binding Ring T-type Mushroom Hole - 15mm Diameter

Features:Different ring sizes to suit different thicknesses. 15mm ring diameter can hold 50 sheets paper.With this binding ring the paper can be combined at will the inner page can be flipped and can be increased or decreased at will.The mushroom hole ring can be used for A7 A6 A5 A4 B5 papers of various sizes notebook can be folded at 360 degrees.It is also very tight and firm in use and will not fall easily. This is a good choice for everyday notebook binding.The use of this product may also require a mushroom hole puncher it can punch paper and then bind the paper with these ring.The binding rings can be used with TO NOTE notebook add sheets to your TO NOTE very convenient to use. Perfect for students office workers travelers designer etc.Specifications:Color: Red/Blue/Yellow(optional)Ring Diameter: 10mm/15mm/20mm/25mm(optional)Material: ABSQuantity: 12pcsMushroom Binding Ring Adapts to Thickness:10mm can hold 30 sheets of paper15mm can hold 50 sheets of paper20mm can hold 80 sheets of paper25mm can hold 100 sheets of paper (paper is A4 paper thickness)Package Size:10mm: 12.8 * 5.2 * 0.7cm / 5.0 * 2.0 * 0.3in15mm: 13.9 * 4.4 * 1.7cm / 5.5 * 1.7 * 0.7in20mm: 14.4 * 5.0 * 2.2cm / 5.7 * 2.0 * 0.9in25mm: 15.3 * 5.6 * 2.7cm / 6.0 * 2.2 * 1.1inPackage Weight:10mm: 9g / 0.3oz15mm: 11g / 0.4oz20mm: 15g / 0.5oz25mm: 21g / 0.7ozNote:The TO NOTE Notebook and puncher are not included.Package List:1 * Mushroom Binding Ring Set