3 ring binder, PR210-3-25/20, pull-open 3 ring clip item: PR210-3-25/20 length: 206mm width: 20mm inner diameter: 25mm height: 29.5mm ring idstance: 70*70mm binding thickness: 20.5 packing: 300pcs/ctn Features: 1. Easily attached and detached, harm-free from paper files 2. Simple design, elegant looking. 3. Stable structure. Not easy to scratch or dent. 4. Durable, rust-resistant. 5. High quality, competitively low price, fast delivery. 6. Small orders accepted. 7. OEM service available. 8. Most of our products can be customized according to different needs!