●Welcome to my store, we are committed to creating a perfect and pleasant shopping for our customers. We have a variety of binding machines for you to choose from.●Name: Binding punching machine●Applicable paper: A4●Applicable consumables: rubber ring/clamp strip●Punch number: 21 holes●Margin: 3mm, 5mm, 7mm●Punching capacity: 22 sheets 80 grams●Binding capacity: 400 sheets●Punch size: 3*8mm●Number of draws: 21●Size: 45*31*50cm (17.71*12.2*19.68 inches)●Gross weight: about 9.1KG●Features:1. Convenient and practical2. Humanized design, simple and generous3. Convenient and labor-saving, easy to bundle,4. Real materials▲Note: This product only sells binding machines, not other products.√Due to different measuring tools and methods, there may be an error of 1-3cm!√Due to different light, chromatic aberration may occur, but please choose carefully within a reasonable range!√ Welcome to our store! If you have any questions, please feel free to contact us!√We will try our best to solve the problem for you. Please give us a chance to solve your problem.